There are three periods after HIV infection: the acute phase, the asymptomatic phase, and the AIDS phase. In the acute phase, patients may develop atypical symptoms about 2-4 weeks after HIV infection, the most common of which is fever, accompanied by headache, nausea, vomiting, swollen lymph nodes, diarrhea, rash, etc. These symptoms will resolve on their own in about 1-3 weeks. The asymptomatic phase can last for about 6-8 years, during which most patients have no obvious symptoms, and eventually progress to AIDS due to immune deficiency. In the AIDS stage, patients can develop various infections, and the symptoms can be diverse, such as pneumonia due to Pneumocystis carinii, respiratory distress, chest tightness, cough, fever, etc., and a rash all over the body due to infection with Penicillium marneffei. Therefore, for patients with AIDS, once diagnosed, timely antiviral treatment should be given to avoid progression to the AIDS stage.