It is generally impossible to determine whether a person is infected with AIDS by external manifestations. AIDS is divided into three main clinical stages, namely the acute HIV infection stage, the asymptomatic HIV infection stage and the true AIDS onset stage. When a patient is in the acute stage of HIV infection, he or she will have some symptoms, which are very difficult to distinguish from the common cold, and these symptoms can indeed disappear on their own after a period of time, so it is not possible to tell whether a person has AIDS or not simply by these symptoms. When a patient enters the asymptomatic HIV infection stage, it is even more difficult to tell because there are no symptoms. When a patient really enters the onset of AIDS, the main manifestations are a variety of conditional infections and tumors, which also do not have any specific clinical manifestations. Some patients are found to be infected with AIDS due to a variety of particularly difficult to control infections. So to determine this, go for an AIDS antibody blood test, but be sure to avoid the window period of high-risk sexual behavior before you take the test.