Sudden allergy, itchiness and redness all over the body are considered to be more likely to cause hives. You can take oral antihistamines, such as levocetirizine hydrochloride capsules, epinastine hydrochloride capsules, epinastine capsules, loratadine citrate capsules, loratadine capsules, loratadine tablets or chlorpheniramine maleate tablets, 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 use topical glycopyrrolate lotion. For urticaria caused by infection, you can order antibiotics such as Zocor, which is levofloxacin injection, and also clindamycin injection, penicillin injection or cefoxitin sodium injection.