The acute phase of AIDS usually occurs about two weeks after infection, and the symptoms last for 1-3 weeks and then gradually resolve. Symptoms in the acute phase are mainly high fever, sore throat, swollen lymph nodes, rash, muscle and joint pain, headache, diarrhea, mouth ulcers, night sweats, and in a few cases, weight loss, and symptoms in the acute phase are similar to severe influenza. The acute symptoms are often described as flu-like symptoms, or symptoms of infectious mononucleosis. The main symptoms of infectious mononucleosis are fever, sore throat, swollen lymph nodes and rash. The most common symptoms in the acute phase of AIDS are fever, headache, muscle and joint pain, and a relatively uncommon rash. Swollen lymph nodes because they can appear in many non-AIDS infected people may also have swollen lymph nodes. The presence of these symptoms does not necessarily mean that one is infected with AIDS, but if one has had high-risk behavior and these symptoms appear during the acute phase, it is recommended to get an antibody test to clarify whether these symptoms come from the acute phase of AIDS.