Smoking is generally not recommended after tooth extraction as it may interfere with the normal healing of the wound. If you must smoke it is recommended to wait at least 3 days or preferably until 1 week later. After the tooth is extracted, a blood clot starts to form in about 15 minutes, and connective tissue gradually grows in after 24 hours, and the gingival epithelium starts to grow and cover the surface of the blood clot in 3-4 days. Moreover, 2-3 days after tooth extraction, dry socket is likely to occur due to infection of the extraction wound, and the extraction socket will produce severe pain, often accompanied by putrid odor and radiating pain, so it is recommended to smoke at least 3 days later. In addition, the painful swelling after tooth extraction usually takes about 7 days to recover, so it is best to start smoking after 7 days. It is recommended that after tooth extraction, do not brush and rinse your mouth on the same day, make sure to protect the blood clot, do not sip or lick the extraction wound, including the action of smoking, and try not to eat hotter or harder foods to reduce the chance of wound infection.