Aids rash is generally a small black spot, slightly higher than the skin, which occurs in the neck and occasionally in the chest and back. For people with fair skin, the rash is dark red or reddish brown; People with dark skin have purple or black rashes. Papular urticaria is a common allergic skin disease in infants. The occurrence of this disease is related to insect bites. Rash mostly occurs on the extended side of trunk and limbs. The rash is a slightly spindle-shaped red air mass with different sizes, and there are often small blisters at the top of the rash.
Some patients have no clinical symptoms at the initial stage of HIV infection, but most of them can have clinical symptoms caused by HIV viremia and acute injury of immune system from 6 days to 6 weeks after HIV infection. The initial symptoms of AIDS are mainly persistent and extensive lymphadenopathy, especially cervical lymph nodes, axillary lymph nodes and inguinal lymph nodes. The diameter of lymph node enlargement is about 1 cm, which is hard, painless and movable for more than three months.