Risk Factors for Seborrheic Dermatitis • Age < 3months or > 30 and <60 • Male > Female • High sebaceous gland activity • Compromised immune system, as in HIV/AIDS, renal transplantation, lymphoma • Neurological and psychiatric diseases e.g. Stroke, Parkinson disease, Alzheimer’s, depression, autonomic dysfunction • Drugs e.g. Dopamine antagonists, lithium, immunosuppressants, PUVA • Low ambient humidity or temperature