Hives in three-year-olds can usually be manifested as a skin rash with a windy doughnut-like pattern, and allergen avoidance and medication can be considered as methods of treatment. 1. Avoid allergens: If the baby repeatedly urticaria, need to consider whether there is food or contact allergens, it is recommended to improve the allergen examination, try to avoid allergens in life, so as not to aggravate the condition. 2. medication: for babies with urticaria-like manifestations, oral anti-allergy drugs such as loratadine, cetirizine and so on, as prescribed by the doctor. At the same time, under the guidance of the doctor, topical drugs such as glycerite, Dinaid cream, etc., so as to relieve the child’s itching symptoms. There are many causes of urticaria, and exposure to allergens is a common cause. If your child suffers from urticaria, it is recommended to consult a doctor immediately, pay close attention to the child’s vital signs, and take medication as prescribed by the doctor, do not take medication without authorization.