The common clinical causes of mouth swelling are mainly the following cases: a. Patients who accidentally fall during strenuous exercise can cause soft tissue damage to the lips, and obvious symptoms of swelling and pain. At this time, the patient can be given thorough local disinfection, local ice for 24 hours to reduce tissue exudation. 24 hours later, change to the external application of blood circulation and stasis cream, hot ointment package, oral bruising injury pill, swelling pain and other drugs to promote the symptoms of mouth swelling faster relief; Second, if the patient falls lip more serious, accompanied by local lacerations and hematoma formation. At this time, the simple external application of drugs is not able to reduce the symptoms of swelling as soon as possible, it is necessary to perform debridement and disinfection of the mouth and lip as soon as possible, thoroughly remove the local hematoma, and suture to stop bleeding. After surgery, we should strengthen the anti-sensitivity, analgesic and swelling support treatment. The symptoms of swollen mouth can be gradually relieved after 3-5 days.