Pain after wisdom tooth extraction is generally a common physiological phenomenon, because in itself, even when extracting a normal tooth, the pain of extraction trauma can be felt after the anesthetic effect wears off. Wisdom tooth extraction is one of the most traumatic types of alveolar surgery, so it is considered normal to have physiological pain after extraction. If it is really difficult to tolerate the pain, analgesic drugs can be applied as appropriate, with common antipyretic and analgesic drugs, such as aspirin, ibuprofen, acetaminophen, etc. However, if there is still severe pain in the wound area more than 3 days after wisdom tooth extraction, accompanied by oral odor, redness and swelling of the extraction wound and pus overflow, we must be alert to the fact that it is not physiological pain, but infection after tooth extraction.