The symptoms of urticaria in children generally include the appearance of erythema and patches of varying sizes on the skin. Some patches may be bright red and then look more obvious. Systemic symptoms can occur, and some children may experience nausea, vomiting, etc. At this time, it may be considered to be caused by allergic factors, and it is necessary to come to the hospital as soon as possible to ascertain the cause in the child. Avoid contact with allergens and then conduct anti-allergy treatment according to the child's condition. If the child's skin scratch test is positive, it can confirm that the child has urticaria. Generally, urticaria subsides quite quickly, and it is considered a specific type of disease.