Seborrheic dermatitis is the single most common rash of adults. When it occurs in infancy, it is commonly called cradle cap. The adult disease tends to favor the scalp, skin behind the ears, forehead, brows, nasolabial folds of the face, mid-chest area, and the mid-back, producing an itchy, red scaling dermatitis. The scaling in the scalp can be conspicuous, producing impressive dandruff . The cause of this condition is unclear, but it responds well to topical steroids and to topical antifungal creams. Medicated shampoos containing tar, selenium sulfide, and zinc pyrithione are often effective. This condition commonly improves spontaneously but will ultimately recur. There is no cure so treatment must continue indefinitely.
Keep in mind that just because your body skin can take more than your facial skin, it doesn't mean you should go overboard with the acne treatments. Blasting your skin with everything you can think of will probably make things worse! It's important to keep an eye out for any kind of irritation you experience. If your body skin gets red or dry, simply take a break from all the treatment products and don't use them again until your skin feels normal. Also, actives like salicylic acid and AHAs will make your skin more sensitive to the sun, so you'll have to practice proper sun protection . (FYI, benzoyl peroxide tends to bleach fabric, so wear light-colored clothes if you use that as a body acne spot treatment!)