It is not possible to generalize how long one can live after the onset of AIDS, it mainly depends on the specific complications and the treatment, generally ranging from a few months to a few years. 1. Complications: In the advanced stage of AIDS, there will be fever, diarrhea, weight loss, enlarged superficial lymph nodes, etc. Meanwhile, it will be accompanied by various kinds of conditional infections, such as oral Candida infection, Pneumocystis carinii pneumonia, herpesvirus infection, and it may be accompanied by tumors. 2. Treatment: Pneumocystis carinii pneumonia or central nervous system infection is the main direct cause of death for most AIDS patients. Untreated patients may only survive for a few months after entering this stage, and their life expectancy may be prolonged if treatment is timely. If found AIDS should seek medical treatment, timely and standardized treatment can inhibit viral replication, reduce viral mutation, improve the quality of life of patients, so that patients can obtain a normal life expectancy.