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 ...
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