Abscess after tooth extraction is usually very difficult to get well on its own. Abscess after tooth extraction refers to the infection after tooth extraction, which is a common complication after tooth extraction, especially in the case of traumatic tooth extraction, such as wisdom tooth extraction for more than 3 days, sometimes there will be redness, swelling and overflow of pus in the extraction wound, and the mouth has a bad smell. In this case, the patient must go to a professional stomatology department as soon as possible for treatment again. Locally, two scrapings can be performed on the extraction wound, or the pus of the extraction wound can be rinsed so that the pus can be better drained. Anti-inflammatory drugs can be considered for the whole body. Generally, in the absence of bacterial culture, cephalosporin combined with nitroimidazole anti-inflammatory drugs can be applied for anti-inflammatory treatment. If there is no significant facial swelling or interstitial infection, temporary dissection may be considered. However, if it is determined that the facial interstitium has become infected with ulcerated pus, it must be incised as early as possible, because if it is not incised and drained as early as possible, it may lead to further spread of infection, causing bacteremia or even sepsis, and even endangering the life of the patient.