Sudden allergy, itchiness and redness all over the body are considered more likely to cause hives. You can take oral antihistamines, such as levocetirizine hydrochloride, epinastine hydrochloride, epinastine, loratadine citrate, desloratadine, loratadine or chlorpheniramine maleate, or even intramuscular injection of chlorpheniramine maleate. If it is no longer good, you can order compound glycyrrhizin injection or compound glycyrrhizin monoammonium S chloride injection, and you can apply topical glycopyrrolate lotion. For hives caused by infection, you can order antibiotics, such as levofloxacin injection, clindamycin injection, penicillin injection or cefoxitin sodium injection.