If it helps, it probably is some sort of organism causing irritation and the
hair loss, and something like ketoconazole cream or even lotramin would be the thing to do. I would go see another dermatologist about it before trying to treat it yourself. Dandruff shampoo should help a bit, but when I had eyebrow and face "dandruff" (seborrheic dermatitis), it was a course of ketoconazole cream that did the trick, and not the dandruff shampoo.