The precursors of AIDS may include the appearance of a skin rash. This is because a persistent high fever, swollen lymph nodes, uncontrollable diarrhea, and a rash around the body can occur during the acute infection period of AIDS. However, not all symptoms will appear, but 1-2 can occur, which is why a rash may appear as a precursor to AIDS. Since the infection route of AIDS is special, mainly through blood and sexual contact, if you have recently had the above-mentioned high-risk contact and a rash appears within 2-4 weeks, it is recommended to go to the local dermatology department to further confirm the diagnosis, and at the same time, you should review the HIV test regularly, and if it is determined to be positive, timely antiviral treatment is recommended. Rashes can also occur with certain opportunistic infections after entering the AIDS phase.