- skin biology
- signs and symptoms
- investigations
- conditions and diseases
Section Links
Seborrheic Dermatitis
- epidemiology
- signs and symptoms
- diagnosis
- pathophysiology
- causes and risk factors
- treatments
- course
- patient education
- community resources
- references
Epidemiology
Affects 1-3% of the population, or over 80% of people living with HIV.
Signs and Symptoms
Chronic inflammatory dermatitis classically affecting areas with many sebaceous glands (hair-bearing) - scalp, forehead, external auditory canal, retroauricular area, nasolabial folds, and central chess.
Macules and papules on an red-yellow, often greasy base. Typically extensive scaling and crusting is present.
No hair loss.
Dandruff.
Symptoms minimal.
In infants, generally improves with time.
Diagnosis
Pathophysiology
Causes and Risk Factors
Cause is unkown, though the lipophilic yeast Malassezia furfur, associated with tinea versicolor, may be important.
Parkinsonism is associated with increased sebum production and seborrheic dermatitis.
Excess sebum is by no means the root cause, though. Acne is associated with increased sebum, but not dermatitis.
Treatments
Treatment with antifungal kekonazole may be helpful.
Course
Patient Education
Community Resources