A viral rash usually resolves completely in about 5 days. Viral rash, also known as viral rash, does not refer to a particular skin disease, but usually refers to a certain type of skin disease, including coxsackievirus rash, echovirus rash, respiratory syncytial virus rash, etc., and specifically refers to measles, rubella, early childhood emergency rash, infectious erythema, Kawasaki disease, etc. Viral rash usually starts early on the face and neck, then gradually spreads to the trunk and finally to the extremities. There are also cases that do not involve the extremities. The onset of the disease is usually accompanied by systemic symptoms such as fever, loss of appetite, malaise, and swollen local lymph nodes. As these diseases are usually self-limiting, the entire course of the disease is usually about 7-10 days, and the rash can gradually subside on its own after the peak of the disease (about 5 days), and there is usually no scaling or pigmentation after subside.