HIV infection does not always have symptoms, and can be clinically divided into acute, asymptomatic and AIDS periods. Different periods may be accompanied by different symptoms. 1. Acute stage: Fever is the most common, accompanied by sore throat, fatigue, night sweats, nausea, vomiting, diarrhea, skin rash, joint pain, swollen lymph nodes and related neurological symptoms. 2. Asymptomatic stage: there may be no symptoms in this stage, and some people may have enlarged lymph nodes. 3. AIDS stage: fever, night sweats, diarrhea, weight loss. Some patients may have memory loss, apathy, personality change, headache, epilepsy and dementia, and enlarged lymph nodes. 4. Accompanying symptoms: cough, dyspnea, headache, impaired consciousness, skin herpes, etc. may occur. AIDS is not easy to diagnose through symptoms. If there are related symptoms or a history of high-risk exposure, the AIDS nucleic acid test or antibody test should be perfected.