Seborrheic dermatitis is a common rash characterized by redness, scaling or flaking, or itching. It mainly affects the skin on the scalp (as dandruff), face, chest and joints. When adults get seborrheic dermatitis, the condition can come and go for the rest of their life. Flare-ups are common with weather changes, and other factors such as stress can also be a trigger. Proper treatment can reduce flare-ups and bring relief. In this video, Dr. Hermenio Lima talks about the different causes and treatment options for seborrheic dermatitis.