TREATMENTS &
RESEARCH
latest
treatment
information
here.
Dr. Huntley's
Diagnosis
Checklist
See what questions
a doctor would ask.
Symptom: FUO
- Introduction: FUO
- Causes (25 conditions)
- Diagnosis Checklist (15 listings)
- Home Diagnostic Testing
- Diagnostic Guides (Online)
- Diagnostic tests (40 listings)
- Multiple Symptom Checker
- Drug causes (17 listings)
- Videos
- Choose Doctor
- Classifications
- Stories from Users
Introduction: FUO
FUO: Fever of unknown origin (fever without known cause). See free access online books about FUO below. See detailed information below for a list of 25 causes of FUO, including diseases and drug side effect causes.
» Review Causes of FUO: full list
Causes of FUO:
The following medical conditions are some of the possible
causes of FUO.
There are likely to be other possible causes, so ask your doctor
about your symptoms.
- Chronic low-level infection
- AIDS
- Tuberculosis
- Leukemia
- Subacute bacterial endocarditis (SBE)
- Cancer
- Abscess
- Drug side effect
- Malaria
- Amebiasis
- Coccidioidomycosis
- Rocky mountain spotted fever
- Blastomycosis
- Histoplasmosis
- Lyme disease
- Brucellosis
- Psittacosis
- Trichinosis
See full list of 25 causes of FUO
» Review Causes of FUO: full list
FUO: Multiple Symptom Checker
Listed below are some combinations of symptoms associated with FUO, 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
- FUO and Fever (21 causes)
- FUO and Temperature symptoms (20 causes)
- FUO and Pain (19 causes)
- FUO and Sensations (18 causes)
- FUO and Nerve symptoms (17 causes)
- FUO and Respiratory symptoms (17 causes)
- FUO and Sweat symptoms (16 causes)
- FUO and Muscle symptoms (16 causes)
- FUO and Swelling symptoms (14 causes)
- FUO and Head symptoms (14 causes)
- FUO and Fatigue (14 causes)
- FUO and Weakness (14 causes)
- FUO and Body symptoms (13 causes)
- FUO and Digestive symptoms (13 causes)
- FUO and Liver problems (13 causes)
- FUO and Liver symptoms (13 causes)
- FUO and Lung symptoms (13 causes)
- FUO and Weight loss (13 causes)
- FUO and Weight symptoms (13 causes)
- FUO and Muscle weakness (13 causes)
See full list of 918 Multiple Symptom Checker combinations related to FUO
Home Diagnostic Testing and FUO
Home medical tests possibly related to FUO:
- Cold & Flu: Home Testing:
Causes of General Symptom Types
Research the causes of these more general types of symptom:
- Fever (1218 causes)
- Common symptoms (4552 causes)
- Temperature symptoms (1011 causes)
- Sick (3133 causes)
Causes of Similar Symptoms to FUO
Research the causes of these symptoms that are similar to, or related to, the symptom FUO:
- Fever (1218 causes)
- Infection (225 causes)
- High fever (61 causes)
Diagnostic Guides for FUO
Medical Books Excerpts Read excertps from published book sections related to FUO from the following published medical books for more detailed information about FUO. Free access (no registration): read all online diagnostic book sections about FUO
Copyright notice for book excerpts: Copyright © 2008 Lippincott Williams & Wilkins. All rights reserved.
Diagnostic tests for FUO:
Various tests are used in the diagnosis of FUO. Some of these are listed below :
- Physical examination
- Temperature - Fevers can be due to infection, malignant disease; metabolic disorders e.g. gout; blood disorders e.g. hemolytic anemia; vascular disorders e.g. stroke, brain hemorrhage; immunological disorders e.g. lupus.
- Examine the heart for a heart murmur which would suggest bacterial endocarditis
- Examine the lungs for noises that suggest pneumonia or bronchiectasis
- Examine the abdomen for enlarged liver - enlarged liver without jaundice may suggest amoebic abscess.
See full list of 40
diagnostic tests for FUO
Diagnosis Checklist: Questions your doctor may ask (and why!)
During a consultation, your doctor will use various techniques in their assessment of FUO. 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:
- How long have you had the fever of unknown origin? - i.e. fever, either intermittent or continuous, that lasts for two weeks or more and when routine investigations have failed to reveal a cause.
- What is the pattern of the fever? - e.g. intermittent fever of malaria; continuous fever is common with viral infections; remittent fever where temperature returns towards normal for a variable period but is always elevated may occur with pelvic abscess and cancer; undulant fever where bouts of fever for several days are followed by several days of normal temperature occur with brucellosis infection and lymphomas.
- Travel history? - overseas travelers or visitors may have special or even exotic infections.
- Recent tick bite? - may suggest Lyme disease.
- Contact with animals or birds? - may suggest Brucellosis (from infected cattle or goats) or Psittacosis (from infected birds).
See Diagnosis Checklist for FUO (15 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 FUO) may include:
- Frequency and burning of urine? - would suggest pyelonephritis, abscess around the kidney or abscess in the prostate.
- Cough? - may suggest pneumonia, lung abscess, bronchiectasis or tuberculosis.
- Bone pain or bone swelling? - may suggest osteomyelitis.
- Pain and location of the pain? - can help determine focus of infection.
- Body discharge? - e.g. vaginal, penile, anal, tooth, ear, nasal.
See Diagnosis Checklist for FUO (15 listings)
Stories from Users for FUO
Real-life user stories relating to FUO:
- unexplained symptoms!!!
- Unexplained "fever" for a month+, please help!!!
- Fever of unknown origin-please help!!!
- unexplained
- My son has fevers of unknown origin and anemia, purple spells?!
- fever of unknown origin
- Help! odd symtoms unexplained!
- High FUO- 5 yr. old son: cycles back around
- unexplain weightloss
- Unexplained symptoms
- Unexplained illness
- unexplained symptom, please help
- Fever of Unknown Origin/Cough
- unexplained fever
- son symptoms unexplained
- Fever of Unknown Origin-FUO
- Unexplained Illness???
- Unexplained symptoms
- neurological origin?
- unexplained illness
Symptom specific forums: The following patient stories in our interactive forums and message boards relate to FUO or relevant symptoms:
- ENMT (Ears, Nose, Mouth and Throat) (275)
- Cardiovascular (Heart and Blood Circulation) (171)
- Respiratory (Lungs and Breathing) (136)
- Gastrointestinal (Food - from entry to exit) (452)
- Genitourinary (The urination system) (138)
- Integumentary (Skin) (244)
- Hematologic/Lymphatic (Blood and Lymph) (106)
- Allergic/Immunologic (88)
- Sexual/Reproductive/Gynecological (456)
Videos for FUO
Allergy Basics
What is an allergy and what is it that causes some people to suffer from them? Why do allergies flare up during certain times of the year? Learn...
Arthritis: Who's At Risk?
For most people, arthritis means simply pain in or around a joint. But there are over 100 different kinds of arthritis, each with its own set of...
Types of Kidney Stones
Not all kidney stones are alike. Learn about the different types, and how each kind of stone brings its own specific problems.
A New Way to Attack NHL
One of the newest treatments for non-Hodgkin's lymphoma is radioimmunotherapy, a clever mixture of old and new that better targets cancer cells.
Patient Surveys for FUO
- Patient Profile Survey
Take Survey View Results - Survey about diseases related to your FUO
Take Survey View Results
Medications or substances causing FUO:
The following drugs, medications, substances or toxins are some of the possible
causes of FUO 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 17
medications causing FUO
Definitions of FUO:
FUO: Abbreviation for fever of unknown origin.
Source: Stedman's Medical Spellchecker, © 2006 Lippincott Williams & Wilkins. All rights reserved.
Organs affected by FUO:
The list of organs typically affected by FUO may include, but is not limited to:
- General constitution
Detailed list of causes of FUO
The list below shows some of the causes of FUO mentioned in various sources:
See full list of 25 causes of FUO
How Common are these Causes of FUO?
This information refers to the general prevalence and incidence of these diseases, not to how likely they are to be the actual cause of FUO. Of the 25 causes of FUO that we have listed, we have the following prevalence/incidence information:
- 0 causes are "very common" diseases
- 2 causes are "common" diseases
- 1 causes are "uncommon" diseases
- 1 causes are "rare" diseases
- 13 causes are "very rare" diseases
- 9 causes have no prevalence information.
See the analysis of the prevalence of 25
causes of FUO
Conditions listing symptoms: FUO:
The following list of conditions have 'FUO' 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.
H
K
L
N
T
Join in at the forums
Ask or answer a question about symptoms or diseases at one of our free interactive user forums.
Medical story forums: If you have a medical story then we want to hear it.
Causes of FUO Based on Risk Factors
This information shows analysis of the list of causes of FUO based
on whether certain risk factors apply to the patient:
Doctors and specialists: Who should I consult about FUO?
Depending on the seriousness of the onset of FUO, you may want to consult one of the following medical professionals.
Important:In extreme cases, always seek advice from emergency services :
- General practitioner
- Emergency physician
- Neurologist
- Infectious disease specialist
Classifications of FUO:
Medical Conditions associated with FUO:
Fever (982 causes), Common symptoms (4525 causes), Temperature symptoms (1009 causes), Sick (3125 causes)
Symptoms related to FUO:
Fever (982 causes), Infection (171 causes), High fever (58 causes)
FUO as a disease:
For a more detailed analysis of FUO as a disease, please see our Disease Center information for FUO.
Medical articles on signs and symptoms:
Doctor-patient articles related to symptoms and diagnosis:
- What to tell your doctor about your symptoms
- What questions will the doctor ask about your symptoms (and why)?
- What does your doctor do in a physical examination?
- What questions should you ask the doctor about a symptom or diagnosis?
- What questions to ask the doctor about the treatment
- Steps to take to get the most out of a doctor visit
- More articles on symptoms and diagnosis
These general medical articles may be of interest:
- Medical Symptom Books
- Symptoms of the Silent Killer Diseases
- Online Diagnosis
- Self Diagnosis Pitfalls
- Pitfalls of Online Diagnosis
See full list of premium articles on symptoms and diagnosis
Related medical articles from our Disease Center for Fever of Unknown Origin:
- Introduction: Fever of Unknown Origin
- Basic Summary for Fever of Unknown Origin
- Videos for FUO
- Symptoms of Fever of Unknown Origin
More Ways To Research Medical Signs and Symptoms:
- Symptom Center - over 2,500 symptoms listed
- Symptom List
- Symptom Descriptions
- All Symptoms
- Diseases Center - find symptom lists for over 8,000 diseases.
- Books on Medical Symptoms
- Books on Medical Diagnosis
» Next page: Causes of FUO
Medical Tools & Articles:
Next articles:
- Causes of FUO
- Diagnostic Guides Online for FUO
- Fever (In a Page: Signs and Symptoms)
- Rash with Fever (In a Page: Signs and Symptoms)
- Fever – Unknown Origin (In A Page: Pediatric Signs and Symptoms)
Tools & Services:
- Bookmark this page
- Take a survey relating to FUO
- Symptom Search
- Symptom Checker
- Medical Dictionary
- Give your feedback
Medical Articles:
Forums & Message Boards
Major Disease Research
symptoms, treatments,
and misdiagnosis
of major diseases.
Multiple Symptom
Checker
or many
symptoms
» Symptom checker
» Medical dictionary
» Videos
» Ask a Doctor
» Misdiagnosis center
» Forums & Message Boards
