Whether or not the rash due to AIDS is itchy is related to the progression of the disease and whether or not it is comorbid with other diseases. The rash in the acute phase of the disease is usually not itchy, but the rash during the onset of AIDS is often accompanied by itchy symptoms. The acute-phase rash mainly appears 2 to 4 weeks after the initial invasion of the virus, and is often characterized by red or reddish-brown blotches or papules, commonly on the face, neck, and trunk. In severe cases, the rash may appear all over the body, at this time, the rash is usually not itchy, occasionally there may be a slight pressure and pain, lasts about 1 to 3 weeks or so can disappear on its own. When the patient is in the AIDS stage of the rash can be non-infectious skin manifestations, such as seborrheic dermatitis, etc., or infectious skin manifestations, such as herpes zoster, etc., at this time there may be itching symptoms of the rash. The itchiness of the rash cannot be used as the basis for the diagnosis of AIDS. If the symptoms worsen, the patient should consult a doctor for examination and actively cooperate with the doctor for treatment without delay, so as to avoid delaying the condition.