How long does it take for the swelling of the lips to subside, depending on the cause of the swelling of the lips, the time for the swelling to subside also varies. First, if the lips are swollen caused by mouth ulcers, you can take tablets orally to promote the healing of the ulcers, ulcers heal after the swelling of the lips can be completely subsided, usually takes a week. Second, if the patient eating food caused by allergic edema, this time the patient can oral loratadine and other anti-allergy drugs. Generally 3-5 days after the swelling of the lips can slowly subside. Third, if the patient suffered trauma caused by soft tissue damage to the lips, at this time and accompanied by a small amount of local bleeding, the need for local pressure to stop bleeding. If necessary, even need to clear the wound suture treatment. 24 hours of local ice packs, 24 hours after the oral bruise pills, blood circulation and blood stasis tablets, improve the swelling of the lips, the swelling of the lips generally need two weeks.