Emergency rash in children is a phenomenon in which children have repeated high fever after viral infection and the rash comes out when the fever subsides during the recovery period of the disease. The reason why children cry after an emergency rash is because: first, the child’s thermoregulatory center has changed, resulting in maladjustment to temperature. Second, the child’s emergency rash is more serious, more out, more obvious congestion, the child will have the feeling of skin discomfort, so will cry. This kind of crying situation family members do not need to worry, only to give the normal care of the recovery period, the normal application of antiviral drug treatment, while the appropriate amount of warm water to avoid children repeated cold. Third, after the fever subsides, there may be some gastrointestinal discomfort and crying. It is recommended to have a light and easily digestible diet, and generally the rash will subside in 2-3 days and the symptoms will disappear.