Why does red dot rise on the body after child has a fever

Red spots appear on the body after a fever in children. Most cases are related to acute rash, urticaria, and hand, foot and mouth disease in children. When the body temperature is properly controlled, the red rash on the child's body also disappears, which proves that it is acute rash and urticaria in children. If the fever goes down, If the rash still does not disappear after the fever goes down, it is considered to be hand, foot and mouth disease.