See a dermatologist. There are new medications available now that are MUCH better than anything that was around before. It's not his fault, and it's very treatable. While I'm generally supportive of "alternative" treatments, this is one of the diseases for which the prescription medications, under a doctor's care, are clearly best. And do go right to a dermatologist if it's more than a mild condition (which it sounds like this is); some of the better medications should only be used under a dermatologist's supervision.

Here's an informational pamphlet from the American Academy of Dermatology. Feel free to send me a personal message if you have specific questions.

Aloha,
Mark