The causes of urticaria in children include food or drug factors, infectious factors, physical and chemical factors, etc. Treatment includes avoidance of contact with allergens, medication, and desensitization therapy. 1. Food or drug factors: common allergens such as milk, eggs and seafood, certain antibiotics such as cephalosporins, non-steroidal anti-inflammatory drugs such as ibuprofen, etc., should try to avoid re-exposure to these substances, the rash is obvious can be used to alleviate the discomfort of anti-allergy drugs such as loratadine, and in severe cases, you can choose to desensitization therapy. 2. Infectious factors: children’s immunity is low, easily infected with bacteria or viruses and cause urticaria, should first treat the primary disease, bacterial infections given antibiotics to fight infection, such as cephalosporins, viral infections can be cured, no need for special treatment. 3. Physical and chemical factors: when the weather becomes hot or cold, too much sunlight, can also cause urticaria, so should be appropriate to increase or decrease clothing, avoid direct sunlight, go out and do a good job of sunscreen measures. Children with urticaria causes more, need to promptly to the hospital to identify the cause of the cause of the disease, under the guidance of the doctor to give regular treatment, the above drugs are recommended to be taken under the guidance of a doctor, can not be used on their own.