Neurodermatitis is not a precursor to AIDS and is not directly related to AIDS, which are two different diseases. 1. Neurodermatitis, also known as chronic lichen simplex, is a chronic skin disease, the cause of which is currently unknown, and it is generally believed that its onset is closely related to neuropsychiatric factors. 2. AIDS is a chronic infectious disease caused by human immunodeficiency virus infection of the human body, usually through sexual behavior, blood and mother-to-child transmission, in the acute infection period may have fever, sore throat, rash and other minor symptoms. Therefore, neurodermatitis is not a precursor of AIDS, but if infected with HIV, there is also the possibility of inducing neurodermatitis; in addition, in AIDS, the patient due to severe impairment of immune function, may be combined with a variety of diseases, may also be combined with neurodermatitis. If HIV infection is suspected, it is recommended to go to a regular hospital in time and follow the doctor’s instructions for examination.