Eczema and AIDS rash have different causes, different symptoms and different treatments. 1. Different causes: eczema is a common inflammatory skin disease, caused by a variety of internal and external factors; AIDS is a contagious disease caused by human immunodeficiency virus (HIV) infection, mainly attacking the human immune system. 2. Symptoms are different: eczema develops quickly in the acute phase, mostly red spots, papules, itching, oozing, crusting and other symptoms. Chronic phase symptoms are not obvious oozing, skin thickening, mossy changes. The acute stage of AIDS can appear red rash, progress to the AIDS stage may be combined with herpes zoster, herpes simplex and other skin diseases, so that there is a corresponding disease rash performance. 3. Different treatments: Eczema needs to be treated with antihistamines, such as cetirizine hydrochloride tablets and dexamethasone tablets. AIDS patients need to receive antiviral therapy, immunomodulatory therapy, etc.. Eczema and AIDS rash must go to the hospital to consult a professional physician for a clear diagnosis, and it is recommended that patients seek medical treatment in a timely manner to avoid delays.