Very common(5% of adult population is affected)
Men outnumber women,also common in children.
Symptoms range from mild/white,greasy sacles of Danduff to severe crusting and pustular lesions of the scalp,face,neck,upper trunk and flexures.
No hair loss
Itching usually present
Androgens and Yeast(P.Orbiculare)are responsible.
Fatigue,stress,infection and drugs potentiate the condition.