Swelling after an extraction usually takes about a week, and the exact duration of swelling is related to a number of factors. Firstly, it is related to the size of the extraction trauma. If the extraction is very simple, the extraction process is very quick and there is no significant flap or bone removal involved. The clinical reaction to this type of extraction is usually mild, and in some cases there is no significant swelling. Clinical swelling is more serious in most cases of more complex extraction of retained teeth, which involves gingival incision and flap, and bone removal, which is relatively traumatizing and takes a longer period of time. This type of tooth extraction will have a significant swelling and pain process, the swelling is not just after the extraction of teeth to reach the most obvious degree, but in the second to third day after the extraction of swelling to reach a peak, and then the swelling will gradually ease, about a week or so the swelling relief is complete. Of course, the postoperative swelling is mainly related to the size of the extraction trauma, but also has a certain relationship with the patient’s own physical condition.