Symptom: Headache
Introduction: Headache
The possible causes of a headache range from a relatively harmless
common headache or common cold
to life-threatening emergencies like meningitis or even the unlikely
occurrence
of a brain tumor.
Various types of headache are possible: common headache, migraine,
cluster headache, sexual headache, or other types of headache.
Any incident of head injury (i.e. brain injury), even in the past,
raises the possibility of concussion or other results of head injury.
Headache also commonly occurs with various diseases that also cause fever,
of which there are numerous possibilities; see causes of fever.
Prompt medical attention for diagnosis and treatment is advisable
for any headache.
» Review Causes of Headache:
full list
Causes of Headache:
The following medical conditions are some of the possible
causes of Headache.
There are likely to be other possible causes, so ask your doctor
about your symptoms.
See full list of 967
causes of Headache
» Review Causes of Headache:
full list
Causes of Types of Headache:
Review the causes of these more specific types of Headache:
See full list of 25
types for Headache
Headache: Multiple Symptom Checker
Listed below are some combinations of symptoms associated with Headache, as listed in our database.
Visit the Multiple Symptoms Checker,
to add and remove symptoms and research your condition.
Multiple Symptom Checker - Other Symptoms
Multiple Symptom Checker Combinations
See full list of 1953
Multiple Symptom Checker combinations related to Headache
Causes of General Symptom Types
Research the causes of these more general types of symptom:
Causes of Similar Symptoms to Headache
Research the causes of these symptoms that are similar to, or related to, the symptom Headache:
Diagnostic Guides for Headache
12 MEDICAL SYMPTOM BOOKS: FULL TEXT ONLINE!
Read the full text of published book sections related to Headache
from the following published medical books
for more detailed information about Headache.
Free access (no registration): read all online diagnostic book sections about Headache
16 MEDICAL BOOKS ONLINE!Full text. Free access (no registration).
- "In a Page: Signs and Symptoms"
- "In A Page: Pediatric Signs and Symptoms"
- "Differential Diagnosis in Primary Care"
- "Handbook of Signs & Symptoms (Third Edition)"
- "A Pocket Manual of Differential Diagnosis"
- "Professional Guide to Diseases (Eighth Edition)"
- "Professional Guide to Diseases (Eighth Edition)"
- "Professional Guide to Diseases (Eighth Edition)"
- "Professional Guide to Signs & Symptoms (Fifth Edition)"
- "The 10-Minute Diagnosis Manual: Symptoms and Signs in the Time-Limited Encounter"
- "Field Guide to Bedside Diagnosis"
- "Signs & Symptoms: A 2-in-1 Reference for Nurses"
- "The Diagnostic Approach to Symptoms and Signs in Pediatrics"
- "Nursing: Interpreting Signs and Symptoms"
Copyright notice for book excerpts: Copyright © 2008 Lippincott Williams & Wilkins. All rights reserved.
Misdiagnosis and Headache
Migraine an undiagnosed cause of headache: It is surprising that many migraine sufferers are not
initially diagnosed. Although the condition is...read more »
RLS sleep disorder causing night-time leg sensations often misdiagnosed: A common but relatively unknown
sleep-related disorder called Restless Leg Syndrome (RLS) is...read more »
Leg cramps at night a classic sign: The symptom of having leg muscle cramps,
particularly at night, is a classic sign of undiagnosed diabetes.
However, there are also various other causes.
See causes of leg cramps or misdiagnosis of diabetes....read more »
Mild traumatic brain injury often remains undiagnosed: Although the symptoms
of severe brain injury are hard to miss,
it is less clear for milder injuries, or even those causing a mild concussion diagnosis...read more »
MTBI misdiagnosed as balance problem: When a person has symptoms
such as vertigo or dizziness, a diagnosis of brain injury may go overlooked.
This is particularly true of mild traumatic brain injury ...read more »
Post-concussive brain injury often misdiagnosed: A study found that soldiers who had
suffered a concussive injury in battle often were misdiagnosed on their return.
A variety of symptoms can occur in post-concussion syndrome and these were not...read more »
Children with migraine often misdiagnosed: A migraine often fails to be
correctly diagnosed in pediatric patients.
These patients are not the typical migraine sufferers,...read more »
Hypertension misdiagnosis common in children: Hypertension is often
misdiagnosed in adults (see misdiagnosis of hypertension), but its misdiagnosis is even more likely in children.
Some of the symptoms of hypertension that can be overlooked include chest pain, ...read more »
Pituitary conditions often undiagnosed cause of symptoms: There are a variety of symptoms
that can be caused by a pituitary disorder (see symptoms of pituitary disorders).
For example, fatigue, ...read more »
Vitamin B12 deficiency under-diagnosed: The condition of Vitamin B12 deficiency
is a possible misdiagnosis of various conditions, such as multiple sclerosis (see symptoms of multiple sclerosis).
See symptoms of Vitamin B12 deficiency or misdiagnosis of...read more »
Glaucoma-red eye: Acute angle closure glaucoma is a medical emergency and can very often be misdiagnosed when it makes an atypical presentation.It occurs...read more »
Pheochromocytoma can mimic an anxiety attack: Pheochromocytoma is a tumour of the adrenal
glands which secretes excessive amounts of catecholamines such as epinephrine
and nor-epinephrine. It usually occurs in young...read more »
Weil's disease has poor outcome in severe cases: Leptospirosis( Weil's disesase) is a zoonotic
condition which occurs due to the entry of spirochetes called leptospira. Transmission occurs by direct contact with the body fluid
of an acutely infected animal or by...read more »
Rash of Dengue can be misdiagnosed: Dengue
fever also known as 'breakbone fever' is a mosquito borne viral infection. The
most common clinical presentation is that of severe...read more »
Immediate care in extradural haematoma: Extradural haematoma
is a surgical emergency because it can lead to death if the clot is not removed
promptly. It usually occurs following a head injury that has resulted in only a
transient loss of...read more »
Rare cases of headache: Headache is
one of the common symptoms presenting in general practice. It needs a sound
diagnostic and management strategy as the problem can be confusing. The key to
diagnosing the condition is to know and understand the cause. A...read more »
Ross river fever an epidemic polyarthritic condition: Ross river fever
is prevalent in mosquito prone areas and in tropical regions. It can occur in
all age groups but presents most commonly between 20- 30 years of age. The patient
complains of polyarthritis,...read more »
Hidden cancer- Nasopharyngeal carcinoma: This is a cancer which occurs in the nasopharynx - an area located
behind the nose and above the throat. Vague...read more »
Read more about Misdiagnosis and Headache
Diagnostic tests for Headache:
Various tests are used in the diagnosis of Headache. Some of these are listed below :
- Physical examination
- Blood pressure
- Temperature (if elevated must consider meningitis, but may be due to respiratory infection, sinusitis)
- Feel the temporal arteries, face and neck muscles, cervical spine, sinuses, teeth and temporomandibular joints
- Examine for neck stiffness which most commonly indicate meningitis or subarachnoid hemorrhage but may also indicate brain hemorrhage or cerebral abscess
See full list of 24
diagnostic tests for Headache
Diagnosis Checklist: Questions your doctor may ask (and why!)
During a consultation, your doctor will use various techniques in their assessment of Headache.
Your doctor may ask several questions when assessing
your condition. It is important to remember that your consultation is a two-way process and any extra information
you can share with your doctor about your symptoms may help them with their diagnosis.
Some of the questions your doctor may ask are listed below:
- Have you got the headache at present?
- Have you had this type of headache before?
- How often do you get the headaches?
- How long do the headaches last?
- Where exactly is the headache?
See Diagnosis Checklist for Headache (38
listings)
Diagnosis Checklist: Associated symptoms your doctor may ask about (and why!)
Sometimes, other symptoms may be present and may help your doctor analyse
your condition.
The symptoms your doctor may ask about (in association with Headache) may include:
- Pain in the back of the head or neck? - may suggest cervical spondylosis (degeneration), cervical dysfunction.
- Nausea or vomiting? - may suggest migraine, brain tumor, meningitis or subarachnoid hemorrhage.
- Unusual sensations in your eyes, such as flashing lights? - may suggest migraine or preeclampsia.
- Dizziness, weakness or any strange sensations?
- Does the light hurt your eyes? - may suggest migraine, meningitis.
See Diagnosis Checklist for Headache (38
listings)
Stories from Users for Headache
Real-life user stories relating to Headache:
Symptom specific forums:
The following patient stories in our interactive forums and message boards
relate to Headache or relevant symptoms:
Videos for Headache
Migraine headaches can do more than ruin your day - they can interfere with your life. But migraines can be managed. Learn what can be done to...
Anyone who suffers from headaches knows they can put a damper on everyday life. But not all headaches are alike. Learn what type of headache you have.
Pain from migraines can be so debilitating that it affects a sufferer's ability to carry on his or her daily activities and diminishes his or her...
Many migraine sufferers are using alternative treatments to prevent and alleviate their migraine attacks.
See full list of 13 related videos
Patient Surveys for Headache
Causes of Headache listed in Disease Database:
Other medical conditions listed in the Disease Database as possible
causes of Headache as a symptom include:
See full list of 967
causes of Headache
- (Source - Diseases Database)
Medications or substances causing Headache:
The following drugs, medications, substances or toxins are some of the possible
causes of Headache as a symptom.
Always advise your doctor of any medications or treatments you are using,
including prescription, over-the-counter, supplements, herbal or alternative treatments.
See full list of 2785
medications causing Headache
Drug interactions causing Headache:
When combined, certain drugs, medications, substances or toxins may react
causing Headache as a symptom.
Always advise your doctor of any medications or treatments you are using,
including prescription, over-the-counter, supplements, herbal or alternative treatments.
- Phenelzine and tricyclic antidepressant interaction
- Nardil and tricyclic antidepressant interaction
- Parnate and tricyclic antidepressant interaction
- Helidac and alcohol interaction
- Metronidazole and alcohol interaction
See full list of 2307
drug interactions causing Headache
Definitions of Headache:
Headache: Pain in various parts of the head, not confined to the area of distribution of any nerve.cephalodynia. SYN: cephalalgia, encephalalgia, encephalodynia.
Source: Stedman's Medical Spellchecker, © 2006 Lippincott Williams & Wilkins. All rights reserved.
Pain in various parts of the head, not confined to the area of distribution of any nerve.
- (Source - Diseases Database)
Pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs
- (Source - WordNet 2.1)
Pain in the cranial region that may occur as an isolated and benign symptom or as a manifestation of a wide variety of conditions.
- (Source - CRISP)
Organs affected by Headache:
The list of organs typically affected by Headache may include, but is not limited to:
Detailed list of causes of Headache
The list below shows some of the causes of Headache mentioned in various sources:
See full list of 967
causes of Headache
How Common are these Causes of Headache?
This information refers to the general prevalence and incidence of these diseases,
not to how likely they are to be the actual cause of Headache.
Of the 967
causes of Headache that
we have listed, we have the following prevalence/incidence information:
- 30
causes are "very common" diseases
- 24
causes are "common" diseases
- 15
causes are "uncommon" diseases
- 7
causes are "rare" diseases
- 70
causes are "very rare" diseases
- 855
causes have no prevalence information.
See the analysis of the prevalence of 967
causes of Headache
Conditions listing symptoms: Headache:
The following list of conditions
have 'Headache' or similar
listed as a symptom in our database.
This computer-generated list may be inaccurate or incomplete.
Always seek prompt professional medical advice about the cause
of any symptom.
A
Acanthamoeba infection
... headacheAcanthamoeba infection of the central nervous system
... headacheAcanthocheilonemiasis
... headacheAcid-Base Imbalance
... headacheAcoustic neuroma
... headacheAcquired Aplastic Anemia
... headacheAcromegaly
... headaches, headache, headacheActinomycetales infection
... headacheAcute Disseminated Encephalomyelitis
... headacheAcute fatty liver of pregnancy
... headacheAcute Gastritis
... headacheAcute hemorrhagic leukoencephalitis
... severe headacheAcute kidney failure
... headachesAcute leukaemia of ambiguous lineage
... headacheAcute megacaryoblastic leukemia
... headacheAcute myeloblastic leukemia type 1
... headacheAcute myeloblastic leukemia type 2
... headacheAcute myeloblastic leukemia type 3
... headacheAcute myeloblastic leukemia type 4
... headacheAcute myeloblastic leukemia type 5
... headacheAcute myeloblastic leukemia type 6
... headacheAcute myeloblastic leukemia type 7
... headacheAcute myelocytic leukemia
... headacheAcute myeloid leukaemia and myelodysplastic syndromes related to alkylating agent
... headacheAcute myeloid leukaemia and myelodysplastic syndromes related to topoisomerase type II inhibitor
... headacheAcute myeloid leukaemia and myelodysplastic syndromes, therapy related
... headacheAcute myeloid leukemia
... Headaches, headacheAcute myeloid leukemia, adult
... headacheAcute posterior multifocal placoid pigment
... headacheAcute radiation sickness
... headacheAcute stress disorder
... HeadacheAcute tin poisoning
... headacheAcute vitamin A toxicity
... severe headacheAddington disease
... headacheAdenosine triphosphatase deficiency, anaemia due to
... headacheAdenoviridae Infections
... headacheAdenovirus infection in immunocompromised patients
... headacheAdies Syndrome
... headacheAdrenal adenoma, familial
... headacheAdrenal Cancer
... headacheAdrenal gland hyperfunction
... headacheAdrenal incidentaloma
... headacheAdrenal medulla neoplasm
... headacheAdult Panic-Anxiety Syndrome
... headacheAfrican Sleeping sickness
... severe headaches, headache, headacheAging brain syndrome
... headacheAIDS
... headacheAldehyde syndrome
... headacheAllergic tension-fatigue syndrome
... migraineAllergies
... headachesAlpine syndrome
... headacheAmnesic shellfish poisoning
... headacheAmphetamine abuse
... headachesAmyloid angiopathy
... headacheAmyloidosis VII
... headacheAmyloidosis, oculoleptomeningeal
... headacheAnemia, hypochromic microcytic
... headacheAnemia, Iron-Deficiency
... headacheAnemia, Refractory, with Excess of Blasts
... headacheAnemia, Refractory, with Excess of Blasts, type 1
... headacheAnemia, Refractory, with Excess of Blasts, type 2
... headacheAneurysm, intracranial berry
... severe headache, headacheAneurysm, intracranial berry, 1
... severe headache, headacheAneurysm, intracranial berry, 2
... severe headache, headacheAneurysm, intracranial berry, 3
... severe headache, headacheAneurysm, intracranial berry, 4
... severe headache, headacheAneurysm, intracranial berry, 5
... severe headache, headacheAneurysm, intracranial berry, 6
... severe headache, headacheAneurysmal subarachnoid haemorrhage
... sudden severe headacheAngiostrongyliasis
... headacheAnthrax
... headacheAortic coarctation
... headaches, headacheAortic dilatation- joint hypermobility- arterial tortuosity
... migraineAplastic anemia
... headacheArachnidism
... headacheArachnoid Cysts
... headaches, headacheArachnoiditis
... severe headache, headacheArbovirosis
... headacheArbovirus
... HeadacheArgentinean hemorrhagic fever
... headacheArnold-Chiari Malformation (Type 1)
... headacheArnold-Chiari malformation type 2
... headacheArnold-Chiari malformation type 3
... headacheArnold-Chiari malformation type 4
... headacheArsenic poisoning
... headacheArterial dissections with lentiginosis
... headacheArteriovenous Malformation
... headachesAsthenopia
... headacheAstrocytoma
... headacheAtypical coarctation of aorta
... headacheAustrian syndrome
... headacheAutoimmune eye diseases
... HeadacheAutonomic dysreflexia syndrome
... headacheAutosomal dominant polycystic kidney disease
... headachesB
Back tumour
... headachesBacterial endocarditis
... headacheBacterial meningitis
... headacheBacterial toxic-shock syndrome
... headacheBaló disease
... headacheBANF acoustic neurinoma
... headacheBarmah Forest virus
... headacheBarotrauma
... headacheBarre-Lieou syndrome
... headacheBartonella infections
... headacheBartonellosis
... headacheBartonellosis due to Bartonella quintana infection
... headacheBartschi-Rochaix syndrome
... headacheBasilar artery insufficiency syndrome
... headacheBasilar artery migraine
... throbbing headache, severe headache, HeadacheBasilar impression primary
... headacheBehcet's Disease
... headacheBenign angiitis of the central nervous system
... headacheBenign astrocytoma
... headacheBlood cancer
... headachesBolivian hemorrhagic fever
... headacheBornholm disease
... headacheBorreliosis
... headacheBorries syndrome
... headacheBortonneuse fever
... severe headache, headacheBotulism food poisoning
... HeadacheBrachial Neuritis
... headacheBrain abscess
... severe headacheBrain cancer
... headachesBrain Concussion
... headacheBrain conditions
... HeadacheBrain Fag syndrome
... headacheBrain Stem Neoplasms
... headacheBrill disease
... severe headacheBriquet syndrome
... headacheBrucellosis
... headaches, headacheBrun's syndrome
... severe headacheBubonic plague
... headacheBullis fever syndrome
... headacheBurnout syndrome
... headacheC
Cadasil
... migraine, headacheCadmium poisoning
... headacheCalcification of basal ganglia with or without hypocalcemia
... headacheCamurati-Engelmann Disease
... headacheCarbon monoxide poisoning
... headachesCarotid Paraganglioma
... headacheCat scratch disease
... headacheCentral nervous system lymphoma, primary
... headacheCentrotemporal epilepsy
... migraineCephalothoracic progressive lipodystrophy
... headacheCerebellar abscess
... headacheCerebellar hypoplasia
... headacheCerebral abscess
... headacheCerebral Aneurysm
... sudden and severe headacheCerebral Arteriosclerosis
... headacheCerebral astrocytoma, adult
... cessation of headache after vomiting, morning headacheCerebral cavernous malformations
... headacheCerebral hemorrhage with amyloidosis, hereditary, Dutch type
... headacheCerebral ventricle neoplasm
... headacheChagas disease
... headachesChemical pneumonia
... headacheChest Cold
... headacheChiari Malformation
... headacheChiari-Frommel syndrome
... headacheChickenpox
... headacheChikungunya
... headacheChildhood-onset cerebral X-linked adrenoleukodystrophy
... headacheChordoma
... headacheChoreoathetosis-spasticity, episodic
... headacheChoroid Plexus neoplasms
... headacheChronic Fatigue Syndrome
... HeadacheChronic Kidney Disease
... headacheChronic myelogenous leukemia
... headacheChronic myelomonocytic leukemia
... headacheChronic Myeloproliferative Disorders
... headacheChronic Obstructive Pulmonary Disease
... headachesChronic Sinusitis
... morning headache, severe headacheChronic vitamin A toxicity
... headacheCiguatera poisoning
... headacheCiliary dyskinesia, due to transposition of ciliary microtubules
... headacheCitrullinemia I, later-onset
... intense headacheClassic migraine
... intense headache, one-sided headache, auraClosed-angle glaucoma
... severe headacheCluster headache
... excruciating headache, one-sided headache, sudden and severe headache, severe headache, headacheCoarctation of aorta dominant
... headacheCoccidioidomycosis
... headaches, headacheCodeine withdrawal
... headacheCold antibody hemolytic anemia
... headacheCommon cold
... headacheCommon migraine
... severe headacheConcussion
... headacheCongenital aplastic anemia
... headacheConn's syndrome
... headacheCooperman-Miura syndrome
... headacheCornea disorders
... HeadacheCortical hyperostosis-syndactyly
... headacheCraniometaphyseal dysplasia dominant type
... headacheCraniometaphyseal dysplasia, autosomal recessive type
... headacheCryptococcal Meningitis
... headacheCryptococcosis
... headacheCutaneous mastocytosis
... HeadacheCyanide poisoning
... headacheCyclic vomiting syndrome
... headacheCyclical edema syndrome
... headacheCysticercosis
... headachesCystinosis, ocular nonnephropathic
... headacheCytomegalovirus
... headacheD
Dana syndrome
... headacheDeafness - lymphoedema - leukemia
... headacheDeafness peripheral - neuropathy - arterial disease
... headacheDecompression sickness
... headacheDelayed Viral Syndromes
... HeadacheDengue fever
... Severe headacheDengue hemorrhagic fever
... headacheDepression
... headachesDepressive disorders
... headachesDercum syndrome
... headacheDevic disease
... headacheDiabetes
... headachesDiabetic hypoglycemia
... headacheDilutional hyponatremia
... headacheDiscontinuation syndrome
... headacheDisequilibrium syndrome
... headacheDissociative Identity Disorder
... HeadachesDressler (D.)syndrome
... headacheDysbarism
... headacheDysthymia
... headachesE
Eagle's syndrome
... headacheEast African Trypanosomiasis
... severe headachesEbola
... headacheEclampsia
... headachesEhrlichiosis
... headacheEmpty Sella Syndrome
... headachesEmpty sella syndrome - acquired
... headacheEmpty sella syndrome - primary
... headacheEncephalitis
... headacheEncephalitis lethargica
... headacheEncephalitis, California serogroup viral
... HeadacheEncephalomyelitis
... headacheEndolymphatic sac tumors (ELST's) in Von Hippel Lindau (VHL) disease
... headacheEnterohemorrhagic Escherichia Coli Infection
... HeadacheEnterotoxigenic Escherichia coli
... headacheEnvenomization by the Martinique lancehead viper
... headacheEpendymoma
... headacheEpidemic typhus
... severe headacheEpidermoid carcinoma
... headacheEpilepsy, nocturnal, frontal lobe type
... auraEpilepsy, nocturnal, frontal lobe type 1
... auraEpilepsy, nocturnal, frontal lobe type 2
... auraEpilepsy, nocturnal, frontal lobe type 3
... auraEpisodic ataxia, type 2
... migraineEpisodic ataxia, type 6
... headacheErysipelas
... headacheErythema chronicum migrans
... headacheEssential thrombocytosis - same as essential thrombocythemia
... headacheEsthesioneuroblastoma
... headacheEvening Primrose oil - adverse effects
... headacheExercise induced anaphylaxis
... headacheExertional headaches
... HeadachesExtradural hematoma
... persistent headacheExtragonadal Germ Cell Tumor
... headacheEye conditions
... HeadachesEye Herpes
... headacheF
Familial dermographism
... headacheFamilial erythrocytosis, 1
... headacheFamilial erythrocytosis, 2
... headacheFamilial erythrocytosis, 4
... headacheFamilial hypertension
... morning headaches, headacheFamilial hypopituitarism
... headacheFavism
... headacheFilovirus
... HeadacheFisher (M.) syndrome
... severe headacheFitz-Hugh syndrome
... headacheFlavivirus
... HeadacheFlavivirus Infections
... headacheFlea-borne diseases
... HeadacheFlu
... headacheFood allergies
... headachesFood poisoning
... headacheForamina parietalia permagna
... headacheFrölich's syndrome
... headachesFroehlich syndrome
... headacheFunctioning pancreatic endocrine tumor
... headacheFungal meningitis
... headacheG
Galactorrhoea-Hyperprolactinaemia
... headacheGanglioglioma
... headacheGastroenteritis
... headacheGeneralized anxiety disorder
... headachesGerlier disease
... severe headacheGestational hypertension
... HeadacheGlénard syndrome
... headacheGlanders
... headacheGlaucoma
... headaches, severe headacheGlaucoma, hereditary
... headacheGlioblastoma
... headacheGlioma
... headacheGliomatosis cerebri
... headacheGliosarcoma
... headacheGlomerulonephritis
... headacheGlomus tympanicum
... headacheGlucosamine - adverse effects
... headacheGold poisoning
... headacheGradenigo's syndrome
... frontal headacheGranulomatous amebic encephalitis
... headachesGranulomatous Angiitis of the Central Nervous System
... headacheGranulomatous hypophysitis
... headacheH
Hand-Foot-Mouth Syndrome
... headacheHangover
... headacheHantavirosis
... headacheHantavirus
... HeadacheHartnup Disease
... headacheHead Cancer
... HeadachesHead Conditions
... HeadachesHead injury
... Headaches, headache, headacheHeadache
... HeadachesHeatstroke
... headacheHELLP syndrome
... headacheHelminthiasis
... headacheHemangioblastoma
... severe headacheHemiplegic migraine, familial type 1
... auraHemiplegic migraine, familial type 2
... auraHemoglobin S/hemoglobin Lepore, Boston
... headacheHemoglobin S/hemoglobin O, Arab
... headacheHemoglobin SC
... headacheHemophilus influenzae B
... headacheHemorragic fever with renal syndrome
... headacheHemorrhagic thrombocythemia
... headacheHenoch-Schönlein purpura
... headacheHepatitis
... headacheHepatitis X (non-A,-B,-C,-D,-E)
... headacheHereditary spherocytic hemolytic anemia
... headacheHereditary vascular retinopathie - Raynaud phenomenon - migraine
... migraineHerpes simplex encephalitis
... headacheHHV-6 encephalitis
... headacheHigh altitude cerebral edema
... severe headacheHilger syndrome
... headacheHip cancer
... headachesHistoplasmosis
... headachesHIV/AIDS
... severe headaches, headacheHoneymoon Bladder
... headacheHuman granulocytic ehrlichiosis
... headacheHuman monocytic ehrlichiosis
... headacheHuman parvovirus B19 infection
... headacheHuman T-lymphotropic virus type 3
... headacheHydrocephalus
... headacheHyper-IgD syndrome
... headacheHyperadrenalism
... headacheHyperemesis Gravidarum
... headachesHyperimmunoglobinemia D with recurrent fever
... headacheHyperostosis frontalis interna
... frontal headacheHyperpituitarism
... HeadachesHyperprolactinemia
... headacheHypertension
... morning headache, headacheHypertensive heart disease
... HeadachesHypoglycemia
... headacheHypoglycemic attack
... headacheHyponatremia
... headacheHypoparathyroidism
... headacheHypoparathyroidism X-linked
... headacheHypopituitarism
... Headaches, headacheHypothalamic dysfunction
... headacheI
Idiopathic edema
... headacheImmotile cilia syndrome, due to defective radial spokes
... headacheImmotile cilia syndrome, due to excessively long cilia
... headacheInfectious arthritis
... headacheInfectious Diarrhea
... HeadacheInsulinoma
... headacheInternal carotid agenesis
... headacheIntestinal Flu
... headacheIntracranial arachnoid cysts
... headacheIntracranial arteriovenous malformation
... headachesIntracranial Embolism
... sudden severe headacheIntracranial germ cell tumour
... headacheIntracranial Hemorrhages
... sudden severe headacheIron deficiency
... HeadacheIrritable bowel syndrome
... headacheIsopsoriasis
... headacheJ
Japanese encephalitis
... headacheJaw conditions
... HeadachesJuvenile pilocytic astrocytoma
... headacheK
Katayama fever
... headacheKidney arteriovenous fistula
... headacheKuru
... HeadachesKyasanur-Forrest disease
... severe headacheL
Lassa fever
... headacheLead poisoning
... Headaches, headacheLeber optic atrophy
... headacheLegionnaires' disease
... headacheLemierre's syndrome
... headacheLeptospirosis
... severe headacheLeukemia
... headachesLeukemia, Myeloid
... headacheLeukemia, Myeloid, Aggressive-Phase
... headacheLeukemia, Myeloid, Chronic
... headacheLeukemia, T-Cell
... headacheListeriosis
... headacheLupus
... headachesLyme disease
... headaches, severe headacheLymphocytic Choriomeningitis
... headacheLysteria monocytoigeneses meningitis
... headacheM
Malaria
... headacheMalformations in neuronal migration
... headacheMalignant astrocytoma
... headacheMalignant germ cell tumor
... headacheMalignant Teratocarcinosarcoma
... headacheManganese poisoning
... headacheMansonella ozzardi infection
... headacheMansonelliasis
... headacheMarburg virus
... headacheMastocytosis
... headacheMastoiditis
... headacheMay-Hegglin Anomaly
... headacheMayaro fever
... headacheMelanoma - astrocytoma syndrome
... headacheMELAS
... migraine, severe headacheMelioidosis
... headacheMeninges cancer
... HeadachesMeningioma
... severe headache, headacheMeningitis
... severe headache, headacheMeningococcal disease
... severe headache, headache, headacheMeningococcal infection
... headacheMercury poisoning
... HeadacheMesenteric Adenitis
... headacheMetal fume fever
... headacheMetastatic insulinoma
... headacheMethahemoglobinemia
... headacheMigraine
... frontal headache, one-sided headache, aura, throbbing headache, severe headacheMild Traumatic Brain Injury
... HeadacheMillian erythema
... headacheMitochondrial diseases
... headacheMitral valve prolapse, familial, autosomal dominant
... headacheMitral-valve prolapse
... headacheMixed connective tissue disease
... HeadachesMN1
... headacheMononucleosis
... headacheMonosodium glutamate (MSG) adverse reaction
... throbbing headache, severe headacheMosquito-borne diseases
... HeadacheMosse syndrome
... headacheMotion sickness
... headacheMountain sickness
... headacheMoyaMoya disease 1
... headacheMoyaMoya disease 2
... headacheMoyaMoya disease 3
... headacheMoyamoya Syndrome
... headacheMucha-Habermann syndrome
... headacheMucormycosis
... headacheMultiple endocrine neoplasia type 1
... headacheMumps
... headacheMuscle contraction headache
... headache, continuous headacheMycoplasmal pneumonia
... headacheMyelitis
... headacheMyelofibrosis-osteosclerosis
... headacheMyoclonus epilepsy
... HeadacheMyofascial pain syndromes
... HeadacheN
Naegleria
... HeadacheNasopharyngeal carcinoma
... headacheNeck Arthritis
... headacheNeck Cancer
... HeadacheNeck conditions
... HeadacheNeck injury
... HeadacheNelson Syndrome
... headacheNelson syndrome I
... headacheNeurocysticercosis
... headachesNeuroectodermal tumors primitive
... headacheNeurofibromatosis-2
... HeadacheNeurosarcoidosis
... headacheNeurosyphilis
... headacheNeurotoxicity syndromes
... headacheNiacin toxicity
... headacheNickel - adverse effect
... headacheNipah virus encephalitis
... headacheNocardiosis
... headacheNonaffective Psychosis
... HeadachesNorwalk gastroenteritis
... headacheNorwalk-like viruses
... HeadacheNose conditions
... HeadachesO
Obstructive sleep apnea
... morning headachesOligodendroglioma
... headacheOmsk hemorrhagic fever
... headacheOphthalmoplegia
... HeadachesOpportunistic infections
... HeadacheOptic neuropathy, anterior ischemic
... headacheOptic pathway glioma
... headacheOrbit Tumour
... headacheOrnithine transcarbamylase (OTC) Deficiency
... headacheOrthostatic hypotension
... headacheOrthostatic intolerance
... headacheP
Paget's disease of bone
... headaches, headachePaget's disease, type 1
... headachePaget's disease, type 4
... headachePancytopenia
... headachePanhypopituitarism
... headachePapilledema
... headachePapilloedema
... HeadacheParaganglioma
... headacheParalytic shellfish poisoning
... headacheParanasal sinus cancer, adult
... headacheParry Romberg Syndrome
... migraine, migraine-like headachesPartial agenesis of corpus callosum
... headachePeanut allergies
... HeadachesPenicillin allergy
... HeadachesPeripheral neuroectodermal tumor
... headachePharyngitis
... headachePharyngoconjunctival fever
... headachePhenol sulfotransferase deficiency
... headachePheochromocytoma
... headaches, headachePheochromocytoma as part of Neurofibromatosis
... headachePineal Teratoma
... headachePinealoma
... headachePineoblastoma, adult
... headachePituitary apoplexy
... headachePituitary Cancer
... headachesPituitary cancer, childhood
... headachePituitary tumors, adult
... headachePlague
... headachePlant poisoning - apple seeds (Malus sylvestris)
... headachePlant poisoning - apricot pits (Prunus armeniaca)
... headachePlant poisoning - bitter almonds (P. dulcis var. amara)
... headachePlant poisoning - black cherry pits (P. serotina)
... headachePlant poisoning - peach pits (P. persica)
... headachePlant poisoning - pear seeds (Pyrus communis)
... headachePneumococcal meningitis
... HeadachePneumococcal pneumonia
... HeadachePneumonia
... headachePneumonia, Viral
... headachePneumonic plague
... headachePolio
... severe headache, headachePollen allergy
... HeadachesPolyarteritis nodosa
... headachesPolycystic kidney disease
... HeadachesPolycystic kidney disease, adult type
... headachePolycystic kidney disease, type 2
... headachePolycythemia
... headachePolycythemia vera
... headachePost streptococcal glomerulonephritis
... headachePost-traumatic stress disorder
... HeadachesPostconcussive syndrome
... headachePostoperative septicaemia
... HeadachePostpartum depression
... headachesPostural orthostatic tachycardia syndrome
... headachePoxviridae disease
... headachePreeclampsia
... persistent headachesPremenstrual dysphoric disorder
... headachePremenstrual syndrome
... headachePrimary amebic meningoencephalitis
... headachePrimary angiitis of the central nervous system
... headachePrimary ciliary dyskinesia
... headachePrimary ciliary dyskinesia, 2
... headachePrimary ciliary dyskinesia, 3
... headachePrimary ciliary dyskinesia, 4
... headachePrimary ciliary dyskinesia, 5
... headachePrimary ciliary dyskinesia, 6
... headachePrimary Hyperaldosteronism
... HeadachesProlactinoma
... headachesProlactinoma, familial
... headachePseudohypoparathyroidism
... headachesPseudomembranous Colitis
... headachePseudopolycythaemia
... headachePseudotumor Cerebri
... headachePsittacosis
... headachePsychiatric disorders
... HeadachesPsychological disorders
... HeadachesPtomaine food poisoning
... HeadachesPulmonary edema of mountaineers
... headachePyle disease
... headacheQ
Q fever
... severe headacheQueensland tick typhus
... headacheR
Rabies
... HeadacheRadiation induced meningioma
... headacheRat-bite fever
... headacheRelapsing fever
... severe headacheRespiratory acidosis
... headacheRespiratory Syncytial Virus Infections
... headacheRetina Conditions
... HeadacheRetinal tear
... HeadacheRhabditida Infections
... headacheRhinocerebral mucormycosis
... headacheRhinocerebral zygomycosis
... headacheRhinovirus
... headacheRhinovirus infection
... headacheRib Tumor
... headachesRickettsia
... HeadacheRickettsia siberica
... headacheRickettsia typhi
... headacheRickettsial disease
... headacheRicketttsialpox
... headacheRift Valley Fever
... headachesRimbaud-Passouant-Vallat syndrome
... headacheRocio encephalitis
... headacheRocky Mountain spotted fever
... severe headache, headacheRubella
... headacheS
Salmonella food poisoning
... severe headacheSandfly fever
... headacheSARS
... headacheScarlet fever
... headacheScarletina (Scarlet Fever)
... headacheSchilder's Disease
... headacheSclerosteosis
... headachesScombroid fish poisoning syndrome
... headacheScombrotoxic fish poisoning
... headacheSecernentea Infections
... headacheSecondary syphilis
... headacheSennetsu Fever
... headacheSensory ataxic neuropathy, dysarthria, and ophthalmoparesis
... migraineSepsis
... HeadacheSerratia cerebral abscess
... headacheSerratia meningitis
... headacheSexual headache
... sudden headache during sexual activityShingles
... headacheSick building syndrome
... headacheSilo unloader syndrome
... headacheSimian B virus infection
... headacheSindbis fever
... headacheSinus cancer
... Headaches, headache, headacheSinusitis
... morning headache, severe headacheSlap-cheek syndrome
... headacheSleep apnea
... morning headachesSleep disorders
... Morning headachesSneddon Syndrome
... headacheSpace adaptation syndrome
... headacheSpencer disease
... headacheSpinal Arthritis
... headacheSpinal shock
... headacheSpirochetes disease
... headacheSpirurida Infections
... headacheSpotted fevers
... HeadacheSt. Anthony's fire
... headacheStachybotrys chartarum
... headacheStaphylococcal infection
... HeadacheStaphylococcal toxic shock syndrome
... headacheStrep throat
... headacheStreptococcal Group B invasive disease
... headacheStress
... headacheStroke
... sudden severe headacheSubacute Thyroiditis
... headacheSubarachnoid hemorrhage
... sudden severe headacheSubdural hematoma
... persistent headaches, severe headachesSubstance Withdrawal Syndrome
... headacheSUNCT headache
... headacheSuperior vena cava syndrome
... headacheSusac syndrome
... headacheSyndactyly, Cenani Lenz type
... headacheSyphilis
... headacheSyphilitic aseptic meningitis
... headacheSyringomyelia
... headachesSystemic mastocytosis
... headacheT
T-cell acute lymphoblastic leukemia
... headacheTakayasu arteritis
... headacheTarlov cysts
... headacheTemporal arteritis
... throbbing headache, headache, headacheTemporo-mandibular ankylosis
... headacheTension headache
... headacheTetanus
... headacheThrombocythemia
... headache 