Urticaria is a kind of allergic reaction, usually the rash can go away on its own, and will not leave traces, but it is recommended to give oral antihistamine medication for treatment of urticaria, if the child is over 1 year old, it can be given dicloxacillin dry suspension oral. In 2 years of age or older can be given loratadine syrup or cetirizine syrup oral treatment, the rash completely subsided after the need to continue to use the drug for three days, while avoiding hot and cold stimulation, if the combination of bacterial and viral infections, the need for active anti-infective treatment. Local topical medication is mainly to stop the itch, such as glycerine lotion for external use. If there is abdominal pain, diarrhea, chest tightness, shortness of breath and other conditions need timely medical attention, hives can be given to severe dexamethasone, epinephrine and other treatments, but also need to pay attention to the best to avoid contact with suspected allergens.