Diarrhea in the early stages of AIDS lacks characteristics and is not significantly different from ordinary diarrhea. AIDS is a chronic infectious disease caused by human immunodeficiency virus infection and can be caused by HIV infection through unclean sexual contact, especially among sexually promiscuous people. In addition, HIV can be contracted through exposure to blood and body fluids. The early stage of HIV infection can have transient clinical manifestations, mainly symptoms of acute viral infection, and the patient can have fever and diarrhea. Diarrhea at this time is usually dilute or watery stools, lasting about 3-5 times a day or more, lacking characteristics, mostly without mucus, pus and blood, and not accompanied by urgency, and can be treated with certain anti-diarrheal medications. For the diagnosis of AIDS, it is important not to rely on symptoms for speculation, but to rely on laboratory tests to confirm the diagnosis of the disease.