Hand swollen by insect bites, should be based on the condition of the disease, the choice of topical drugs or oral medication and other ways to improve. 1. Topical medication: 3% boric acid solution can be used as a wet compress, or glycerite lotion can be applied externally; if the redness and swelling are serious, glucocorticoid drugs such as dianabed and hydrocortisone acetate can be used externally; if accompanied by pain symptoms, lidocaine cream can also be used externally. 2. Oral medication: If the itching is severe, oral antihistamines, such as cetirizine and loratadine, can be taken. If the redness and swelling are severe or accompanied by other discomforts, please go to the hospital in time.