If your scalp is itchy and your shoulders are often covered with a snowfall of flakes, you’ve probably wondered at some point, is this just dandruff — or could it be scalp psoriasis? It’s true that both conditions can cause those annoying white flakes, but dandruff and scalp psoriasis spring from different causes and warrant different treatments.
Here to help sort out all the differences is dermatologist Mona Gohara, M.D., associate clinical professor of dermatology at Yale School of Medicine.