Seborrheic dermatitis is an inherited condition of the skin, scalp, and chest. Areas where there is increased amount of oil are susceptible. Stress and change of season may play a factor. Seborrhea is characterized by a reddish scaliness of the scalp, eyebrows, central cheeks, nose, ears, and sometimes the chest. In unusual circumstances the groin and armpits may also be involved, and occasionally seborrhea can be generalized. One theory is that there is an overgrowth of yeast in these areas and the body mounts an inflammatory reaction against this. Treatment includes topical cortisone lotions, foams, and solutions. Topical anti-yeast medication such as Ketoconazole is used as well as Ketoconazole shampoo. A variety of other topical and oral medications are available for resistant cases.