Also known as seborrheic dermatitis, dandruff is an inflammatory response to an imbalance in the scalp microbiome ... Medical conditions like HIV, acne, rosacea, psoriasis, eczema, Parkinson's disease ...

For example, a patient with scalp psoriasis, I'm still recommending shampoos that might include salicylic acid or coal tar because I think they're more effective in those cases." ...

Dandruff and dry scalp, though similar in flaking and itchiness, stem from different causes: excess oil/fungal overgrowth ...

Medically reviewed by Casey Gallagher, MD Eyebrow dandruff occurs when dead skin cells shed faster than usual. It causes white, yellow, or gray flakes around your brows. Seborrheic dermatitis, a skin ...