Seborrheic dermatitis caused by AIDS has the same symptoms of erythema and flaking as in normal people, but the extent and severity of the lesions increase with the progression of the disease. The incidence of seborrheic dermatitis in AIDS patients can be as high as 80%. When seborrheic dermatitis occurs, erythema and greasy flakes can appear on the face, especially on the eyebrows, nasolabial folds, or whiskers, etc.; when it occurs on the scalp, it can be presented as a scaly type or a crusted type, with erythema or greasy scabs. Skin lesions may also appear on other parts of the body, such as the forehead, armpits, pubic symphysis, external genitalia or groin, etc. They are also covered with greasy scales and may ooze, and scratching may lead to secondary infection, or even turn into erythroderma. After the diagnosis of AIDS, actively control the disease, there is skin damage, timely medical treatment of symptoms.