AIDS ulcers are not sequential, and AIDS does not usually cause skin ulcers. Skin ulcers in AIDS patients are caused by secondary bacterial, fungal or viral infections.
AIDS is a systemic disease caused by infection with the human immunodeficiency virus (HIV), which causes a variety of opportunistic infections and tumors.
Infection with HIV makes the body less immune. As a result it can be very susceptible to bacterial, fungal and viral infections, which may lead to skin problems. For example, bacterial infection can cause severe folliculitis, which may lead to skin breakdown on the forehead and back. A fungal infection causes tinea pedis, which is often followed by impregnated erosions of the foot seams. Infection with the herpes zoster virus may result in skin breakdown at the site of the herpes.
AIDS generally does not cause skin ulcers, and it is recommended to actively seek medical treatment for HIV infection to avoid delays.