It might be pityriasis versicolor. ... "A way to reduce the frequency of recurrent infections is by using an anti-yeast shampoo such as Nizoral once a week as a body wash," Dr Borysiewicz shares.

Tinea versicolor is a common skin issue that causes patches on the neck and back. ... Look for selenium sulfide on the label, which you can find in Selsun Blue shampoo ($9, walgreens.com).

Dear Dr. Gott: I have been plagued with an extensive tinea versicolor skin infection on my back and abdomen since I was a teenager. I was treated by at least five doctors over the years. One ...