Pain 4 days after tooth extraction, this is a time when you need to judge the specific trend of pain and the degree of pain. If it is a very traumatic tooth extraction, in which a series of operations such as flap and bone removal are involved, it is possible that the postoperative pain will continue until the 4th day, but the pain on the 4th day is certainly already significantly lighter compared to the previous one. If there is a sudden onset of pain on the 4th day after extraction, or a sudden increase in pain, this mostly means that the pain is not physiologic, but a pathologic postoperative infection. At this time, in addition to pain, you also need to check the extraction wound, which is usually red, swollen or overflowing pus, and at the same time, there may be a bad smell in the mouth, which needs to be dealt with as soon as possible in a professional medical institution.