In most cases, the extraction of an obstructed tooth will result in swelling because the obstructed tooth itself means that the tooth has lost the space for full eruption and cannot erupt due to the obstruction of soft or hard tissues. In such cases, the tooth must be extracted by incision, and the gums must be flap to remove all the hard and soft tissues from the blocked tooth before it can be removed. The relative extraction trauma is relatively large, and the large extraction trauma means heavy postoperative reactions, and the most common postoperative physiological reactions are postoperative swelling and pain. Therefore, there will be a significant swelling process within 2-3 days after wisdom tooth extraction, and usually the swelling will begin to gradually subside after 3 days.