There is no fastest treatment for pediatric acute urticaria. Treatment mainly includes internal, topical medications, injectable medications and other forms of treatment that can help relieve symptoms. 1. Topical medications: Pediatric acute urticaria is related to contact with allergens, resulting in an acute allergic reaction to the skin. If the lesions are not large in size, topical medications can be given, such as glycerite lotion and zinc oxide lotion, which have the effect of astringency and itch relief and can help relieve the symptoms. 2. Internal medication: Itchy skin is more obvious, can be given oral antihistamines, such as cetirizine, to help relieve itching. If necessary, oral glucocorticoid drugs, such as prednisone, methylprednisolone, can control the symptoms. 3. Injectable medication: In case of persistent urticaria, you need to combine with your doctor’s advice to inject hydrocortisone intravenously, which can reduce the recurrence of urticaria. Urticaria in children can cause redness, swelling and itching. If the baby during infancy, need to take antihistamines, need to be approved by the doctor.