It is relatively normal to have swelling on the 2nd day of wisdom tooth extraction. Because the extraction of wisdom teeth is a more traumatic process in alveolar surgery, if flap, debridement and root division are taken in the process of wisdom teeth extraction, the corresponding extraction is more traumatic, and the chance of postoperative edema is very high at this time, and it is not like most patients think that edema will appear immediately after tooth extraction. Generally, there is a gradual swelling process after tooth extraction and then it gradually subsides, and this process reaches its peak 2-3 days after tooth extraction and gradually subsides in about 1 week, that is, the swelling starts on the second day after wisdom tooth extraction, which is a normal physiological phenomenon in most cases and there is no need to worry too much.