Causes of Dandruff
List of causes of Dandruff
Following is a list of causes or underlying conditions
(see also Misdiagnosis of underlying causes of Dandruff)
that could possibly cause Dandruff includes:
More causes:
see full list of causes for Dandruff
Causes of Dandruff (Diseases Database):
The follow list shows some of the possible medical causes of Dandruff
that are listed by the Diseases Database:
Source: Diseases Database
Dandruff Causes: Book Excerpts
Dandruff as a symptom:
Conditions listing Dandruff
as a symptom may also be potential underlying causes of Dandruff.
Our database lists the following as having
Dandruff as a symptom of that condition:
Medications or substances causing Dandruff:
The following drugs, medications, substances or toxins are some of the possible
causes of Dandruff as a symptom.
This list is incomplete and various other drugs or substances
may cause your symptoms.
Always advise your doctor of any medications or treatments you are using,
including prescription, over-the-counter, supplements, herbal or alternative treatments.
Read more about medication causes of Dandruff
What causes Dandruff?
Causes: Dandruff:
Pityrosporon ovale yeast on the scalp.
Related information on causes of Dandruff:
As with all medical conditions,
there may be many causal factors.
Further relevant information on causes of Dandruff may be found in:
Causes of Dandruff: Online Medical Books
16 MEDICAL BOOKS ONLINE!
Review excerpts from medical books online, free, without registration,
for more information about the causes of Dandruff.
Scalp Rash:
Differential Diagnosis
(In a Page: Signs and Symptoms)
- Seborrheic dermatitis (“cradle cap,” “dandruff”)
–The most common scalp condition, it occurs across all age ranges
–May be caused by Pityrosporum ovale
–An inflammatory condition that causes itching and loose, silvery-white scale on scalp, and occasionally blepharitis
–May also affect the eyebrows, nasolabial folds, external auditory canals, chin, anterior chest, upper back, and groin
–Does not cause hair loss
–The scalp is not usually erythematous, but other affected skin areas may be red, greasy, or oily
- Tinea capitis
–Most commonly caused by Trichophyton tonsurans or rarely Microsporum canis
–Presents as patches of scale and/or pruritus with broken hairs, patchy hair loss (i.e., “black dot alopecia”)
–May progress to a kerion (see below)
-
Kerion
–A boggy, tender, subcutaneous fungal
infection (dermatophyte)
–Often has associated drainage and hair loss
Scalp folliculitis
–Presents as recurrent, itchy, crusted papules
or pustules
–An overgrowth of Staphylococcus aureus
- Psoriasis
–Usually presents with plaques of thick, silvery, adherent scalp scale that overlies well-demarcated patches of erythema
–Often occurs at the ears and occipital area
–May be limited to the scalp, but often has skin disease, nail pitting, or nail dystrophy
- Dissecting cellulitis of the scalp
–Chronic, tender, boggy, often suppurative subcutaneous fluctuant masses
–Occurs in black patients
–May be associated with acne keloidalis,
which can cause a scarring hair loss at the occiput
-
Discoid lupus
–Presents initially as well-demarcated erythematous plaques of patchy, scarring scalp hair loss, then spreads centrifugally
Contact dermatitis
» READ BOOK EXCERPT ONLINE »
Source: In a Page: Signs and Symptoms, 2004
Atopic dermatitis:
Causes
(Professional Guide to Diseases (Eighth Edition))
The cause of atopic dermatitis is still unknown. However, several theories attempt to explain its pathogenesis. One theory suggests an underlying metabolically or biochemically induced skin disorder that’s genetically linked to elevated serum immunoglobulin (Ig) E levels. Another theory suggests defective T-cell function.
Exacerbating factors of atopic dermatitis include irritants, infections (commonly caused by Staphylococcus aureus), and some allergens. Although no reliable link exists between atopic dermatitis and exposure to inhalant allergens (such as house dust and animal dander), exposure to food allergens (such as soybeans, fish, or nuts) may coincide with flare-ups of atopic dermatitis.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Diseases (Eighth Edition), 2005
Dermatitis:
Causes and incidence
(Professional Guide to Diseases (Eighth Edition))
The cause of atopic dermatitis is unknown, but a genetic predisposition may be exacerbated by such factors as food allergies, infections, irritating chemicals, temperature and humidity, and emotions. Approximately 10% of childhood cases are due to allergy to certain foods, particularly eggs, peanuts, milk, fish, soy, and wheat. Atopic dermatitis tends to flare up in response to extremes in temperature and humidity. Other causes of flare-ups are sweating and psychological stress.
An important secondary cause of atopic dermatitis is irritation, which seems to change the epidermal structure, allowing immunoglobulin (Ig) E activity to increase. Consequently, chronic skin irritation usually continues even after exposure to the allergen has ended or after the irritation has been systemically controlled.
Atopic dermatitis is most common in infants, usually developing between ages 1 month and 1 year, commonly in those with strong family histories of atopic disease. At least half of those cases clear by age 36 months. These children often acquire other atopic disorders as they grow older. Typically, this form of dermatitis flares and subsides repeatedly before finally resolving during adolescence. However, it can persist into adulthood. In adults, it’s generally chronic or recurring.
» READ BOOK EXCERPT ONLINE »
Source: Professional Guide to Diseases (Eighth Edition), 2005
Arthritis/Dermatitis:
Differential Overview
(Field Guide to Bedside Diagnosis)
❑Lyme disease
❑Erythema nodosum
❑Rheumatoid arthritis
❑Systemic lupus erythematosus
❑Psoriatic arthritis
❑Disseminated gonococcemia
❑Sarcoidosis
❑Scleroderma
❑Dermatomyositis
❑Reiter syndrome
❑Rheumatic fever
❑Behçet syndrome
❑Still disease
❑Hypersensitivity vasculitis
Clinical Findings
Lyme disease Erythema migrans, a rapidly expanding annular rash with a clearing center, is the key early finding. The site of the ixodid tick bite at the center of the lesion is usually intensely indurated, vesicular, or necrotic. The arthritis is an asymmetric oligoarthritis that usually occurs after the rash has resolved.
Erythema nodosum A prodromal syndrome of fever, chills, malaise, and polyarthralgia is followed by the development of lesions that are discrete, tender, slightly raised subcutaneous nodules on the shins or ankles. They represent a hypersensitivity reaction to group A streptococcal infection, tuberculosis, sarcoidosis, inflammatory bowel disease, or drugs such as oral contraceptives and sulfonamides.
Rheumatoid arthritis Symmetric polyarticular arthritis with synovial proliferation, especially of the wrist, and morning stiffness lasting more than 1 hour characterize the early joint involvement. Rheumatoid nodules appear over extensor surfaces. Vasculitic lesions are frequently found on the digits, appearing as small red or purpuric macules that progress to painful nodules or ulcers.
Systemic lupus erythematosus A classic butterfly rash occurs in 40% and is exacerbated by sun exposure. A diffuse maculopapular rash in areas exposed to the sun heralds disease flares. Discoid lesions and scaling plaques that range in color from red to violaceous, with central atrophy and telangiectasias, occur in 20%. Vasculitis, in the form of painful ulcers on the extremities, palpable purpura, or lupus profundus (firm nodules in the subcutaneous fat on the forehead, cheeks, buttocks, and upper arms) are found. The arthritis is typically one of symmetric fusiform swelling of the proximal interphalangeal and metacarpophalangeal joints, diffuse puffiness of the hands, and tenosynovitis.
Psoriatic arthritis Psoriatic plaques, erythematous with a silvery scale, are critical to diagnosis, but may be hidden in the scalp, umbilicus, or gluteal folds. Nail changes such as pitting or yellow discoloration of the nail plate are other clues. The arthritis typically involves the proximal interphalangeal and distal interphalangeal joints, creating sausage digits. The arthritis may become erosive, leading to telescoping of the hands. One-fourth of patients have axial skeletal arthritis.
Disseminated gonococcemia Acral lesions are typically hemorrhagic pustules, but petechiae, hemorrhagic papules, or hemorrhagic bullae can occur. Fever, rigor, tenosynovitis, and polyarthritis are other findings.
Sarcoidosis Transient maculopapular eruptions of the trunk, face, and extremities are often accompanied by uveitis, adenopathy, and parotid enlargement. Translucent reddish-brown to purple indolent plaques may develop on the face (lupus pernio), buttocks, or extremities. Joint symptoms consist of migratory transient arthralgias.
Scleroderma Early findings are primarily Raynaud phenomenon and puffy fingers. Later findings include sclerodactyly (smooth, shiny, tapered fingers with taut, bound-down skin); contractures with “claw hand” deformity; expressionless face (with thin lips, a beak-like nose, and sunken cheeks); microstomia; mat telangiectasias on the nail folds, face, lips, oral mucosa, or trunk; and calcinosis with leathery crepitation over the joints.
Dermatomyositis The classic skin manifestation is a lilac-colored heliotrope rash on the eyelids and in a butterfly distribution. Gottron papules are violaceous, scaly, flat lesions on the extensor aspect of the interphalangeal joints, elbows, knees, and medial malleoli; these occur as a late manifestation. Proximal muscle aching/weakness, not arthritis, is prominent. The patient is unable to reach overhead or arise from a chair. Neck flexors are more involved than extensors.
Reiter syndrome Arthritis, urethritis, conjunctivitis, and mucocutaneous ulcers are found. The arthritis is asymmetric, usually involving the lower extremity joints. Solitary sausage digits may be seen. Tendinitis and fasciitis are common. The mucocutaneous lesions are eroded red vesicles or papules of the corona and glans, which when confluent are called circinate balanitis. Pustules may change into thick hyperkeratotic plaques on the palms and soles, keratoderma blennorrhagicum.
Rheumatic fever There is an acute migratory polyarthritis with fever. Subcutaneous nodules appear over the bony prominences of the elbows, knuckles, ankles, scapulae, and occiput. They are associated with carditis. Erythema marginatum, appearing as evanescent pink lesions with serpiginous borders, is also associated with carditis.
Behçet syndrome The classic triad is arthritis, iritis, and oral and genital ulcerations. Recurrent aphthous ulcers are a sine qua non. They begin as macular erythema that develops into superficial gray ulcers. Scrotal or labial ulcerations are also found. Hypopyon uveitis, a hallmark, is a rare finding. The arthritis is primarily of the knees and ankles.
Still disease Skin lesions are red, flat, and less than 1 cm in diameter. Lesions are evanescent, occurring with fever spikes. A migratory polyarthralgia occurs.
Hypersensitivity vasculitis After an upper respiratory infection, young adults may develop palpable purpura over the extensor surfaces and buttocks. Arthritis, edema, and colicky abdominal pain, followed by bloody stools, suggests the diagnosis.
» READ BOOK EXCERPT ONLINE »
Source: Field Guide to Bedside Diagnosis, 2007
Dermatitis:
Causes
(Handbook of Diseases)
The cause of atopic dermatitis is unknown, but there is a genetic predisposition exacerbated by such factors as food allergies, infections, irritating chemicals, temperature and humidity, and emotions. Approximately 10% of childhood cases are caused by allergy to certain foods, particularly eggs, peanuts, milk, and wheat.
Atopic dermatitis tends to flare up in response to extremes in temperature and humidity. Other causes of flare-ups are sweating and psychological stress.
An important secondary cause of atopic dermatitis is irritation, which seems to change the epidermal structure, allowing immunoglobulin (Ig) E activity to increase. Consequently, chronic skin irritation usually continues even after exposure to the allergen has ended or after the irritation has been systemically controlled.
» READ BOOK EXCERPT ONLINE »
Source: Handbook of Diseases, 2003
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