After the baby was bitten by the poisonous insects, the local redness, swelling and hardening of the situation, considering the papular urticaria, can be relieved by physical therapy, local medication, systemic medication and other methods. 1. Physical therapy: the baby was stung by poisonous insects, you can use ice packs for cold compresses, can play the role of pain and itching, but also to achieve the purpose of swelling. 2. Local medication: after the baby was bitten by the poisonous insects, you can use soap and water to wash locally, and at the same time apply glycerine lotion or glucocorticosteroid ointment, etc., which can play a role in stopping the itching and astringency. 3. Systemic medication: When the local symptoms of itching are severe, you can choose to add oral antihistamines, such as loratadine, cetirizine, etc., to shorten the course of the disease and improve the efficacy. For the phenomenon of secondary bacterial infection after scratching, fusidic acid, compound polymyxin B and other antibiotic drugs can be given appropriately. It is recommended to use medication under the guidance of a doctor, not blindly self-medication, in order to avoid adverse effects.