According to Healthline, an HIV rash most commonly appears on the face and chest, although it can appear on any part of the body. The rash sometimes affects the feet and hands, and it can also cause oral and genital ulcers. About 90 percent of HIV patients develop a rash.
Rash is one of the first symptoms of infection with the HIV virus. A month or two after infection with the virus most people develop flu-like symptoms, including rash, that can last for a few weeks. According to Healthline, the rash causes itchiness and usually appears as a red flattened area covered with small bumps.