A particularly swollen face on the 2nd day after tooth extraction is sometimes a normal physiological phenomenon and is usually seen in more traumatic tooth extractions. Clinically, for simple tooth extractions, such as extraction of baby teeth and extraction of front teeth, patients will not feel significant swelling and pain after such tooth extractions. However, for the more traumatic tooth extraction, especially the extraction of buried wisdom teeth, the operation involves a series of operations such as incision, flap, debridement, root division, extraction, suturing, etc., which is relatively more traumatic and takes longer, and normal postoperative reactions will occur after the operation. The most common ones are post-operative swelling and pain. The swelling does not reach the most obvious section just after the surgery, but there is a process of development. The swelling starts to peak on the second day or at most the third day just after the surgery, and then the swelling will be gradually relieved, and the swelling will be relieved in about 1 week. Therefore, swelling on the second day after tooth extraction is a physiological phenomenon and there is no need to worry too much.