Viral rash usually refers to viral infections causing skin and mucous membrane rash, measles virus for papules, hand, foot and mouth virus for herpes, HIV for non-itching papules and so on.
1. Measles virus: after measles virus infection, the rash is usually light red or dark red papules, varying in size, the skin between the rashes is normal, and the color fades when pressed, and the rash usually appears behind the ear, hairline, and neck at the earliest, and then gradually appears on the face, chest, abdomen, limbs, and even the whole body appears rash.
2. Hand, Foot and Mouth Virus: The herpes caused by Hand, Foot and Mouth Virus is about the size of a soybean, with fluid inside the herpes and a red halo around it. Under normal conditions, the herpes will not itch, will not hurt, and will not scar if not scratched, and will first appear as ulcers in the mouth, followed by papules in the areas of the hands, feet, and mouth, and the papules will be gradually converted into small herpes.
3. HIV: Most of the rashes after HIV infection are red papules without itching, and occasionally there are diffuse urticaria or herpes, and there is liquid inside the herpes.
If a viral rash appears, it is recommended to go to the hospital in time, under the guidance of the doctor to avoid delaying the condition and causing other damages.