The swelling may last for three to four days after tooth extraction, or about seven days in some patients. The duration and degree of swelling after tooth extraction varies from patient to patient. 1. Due to the large amount of damage to the surrounding soft tissues caused by tooth extraction, swelling usually occurs after 12 hours and will slowly subside after about three to four days. If the tooth is more difficult to extract, the trauma of extraction is greater, the tooth is obstructed, especially ambulatory obstruction, some patients may be swollen for about seven days. 2. After tooth extraction, you can use ice to apply cold compresses to the affected cheeks, which is good for swelling, so as not to affect normal life, do not brush your teeth and rinse your mouth, lick the wound with your tongue, etc. within 24 hours. On the day of extraction, you can eat soft food or liquid food, please do not use the extracted tooth to chew food, the diet needs to be light, should not eat stimulating food, generally about seven days after the extraction of the wound will heal.