It is generally impossible to determine whether a person is infected with AIDS through external manifestations. AIDS is mainly divided into three clinical stages, namely the acute HIV infection stage, the asymptomatic HIV infection stage, and the real AIDS onset stage.1. When a patient enters the asymptomatic HIV infection stage, it is more difficult to judge because there are no symptoms.3 When a patient really enters the onset of AIDS, the main manifestations are various kinds of conditional infections and tumors, and there are no special clinical manifestations. Some patients are found to be infected with AIDS due to a variety of infections that are particularly difficult to control. Therefore, to judge, go for a blood test for AIDS antibodies, but be sure to avoid the window period of high-risk sexual behavior before conducting the test.