The symptoms of AIDS usually appear 2-4 weeks after high-risk behavior, mainly the symptoms of acute viral infection, usually manifested as fever, sore throat, swollen lymph nodes, skin rash, diarrhea, fatigue, etc. Routine blood tests may be normal or mildly decreased white blood cells, accompanied by a rise in lymphocytes. Diagnosis of AIDS infection through symptoms is not possible, and generally need to check the AIDS antibody, because the common cold and the acute infection period of AIDS can not be distinguished, the clinical symptoms are similar, so need to check the relevant antibodies according to the clear diagnosis.