Allergic facial swelling usually subsides within 1 to 3 days if the symptoms are mild, and usually recovers in about 1 week if the symptoms are severe and the recovery time is longer. Allergies can cause swelling of the face, but when the symptoms are mild, they can usually subside naturally. Antihistamines such as chlorpheniramine maleate tablets, loratadine, cetirizine, etc. can be used to relieve the swelling, which usually subsides within 3 days. If the symptoms of allergic face swelling are more serious, intravenous calcium gluconate, etc., can be added to the appropriate amount of hormones, such as dexamethasone, etc., usually within 1 week can return to normal. If the phenomenon of allergy face swelling, go to the hospital for treatment in a timely manner, the use of the above drugs should follow the doctor’s instructions.