White flakes on the scalp are not always dandruff. A dermatologist explains how to tell dandruff from dry scalp, fungal infections, psoriasis and other scalp conditions.

The same condition that causes dandruff -- seborrheic dermatitis --also can cause a red and itchy beard. AndreyPopov Getty Images/iStockphoto If the skin under your facial hair is often red, irritated ...

Q: For almost two months now, I've had bumps on the back, sides and crown of my head. They itch all the time — and even more when I get hot. When I scratch, I see white or brown flakes. My ...

Ketoconazole 2%; topical gel (anhydrous). Seborrheic dermatitis is a chronic inflammatory skin disorder that is characterized by a red, itchy, scaly rash typically occurring on the face, scalp, ...

Are dandruff and psoriasis caused by a fungal infection? What is the simplest, least expensive therapy for each? —Gerald Strahs, MD, Havertown, Pa. Dandruff, or seborrheic dermatitis, may be an ...