Sudden swelling of the upper lip, the most common may have three kinds, the specific treatment according to the following: First, angioneurotic edema, which is caused by allergy. This kind of allergy, if once appeared, the first suggestion is to detach from the allergen, and secondly need to take oral anti-sensitive drugs to actively carry on the treatment, anti-sensitive drugs include paracetamol. Secondly, if the sudden swelling of the lips is caused by trauma, the impact of external forces will lead to swelling of the lips or wounds, and such wounds need to be stitched up in time. If there is swelling, you can first ice packs, usually within 24 hours ice packs, after 24 hours can be localized hot packs, preferably after 48 hours and then hot packs are more effective. Third, if it is due to the tooth’s apical abscess caused by interstitial infection produced by the swelling of the lip, then you need to treat the tooth, and anti-inflammatory treatment. Anti-inflammatory drugs usually include cephalosporin, amoxicillin, etc., with the use of metronidazole, tinidazole can play a better antibacterial effect, can quickly eliminate lip swelling.