It is not recommended to smoke the day after tooth extraction to avoid dislodging the blood clot. The next day after tooth extraction, the blood clot in the alveolar fossa is still unstable, smoking may cause the blood clot to fall off, bleeding and swelling of the extraction wound, oral bacteria triggered by the alveolar fossa infection, affecting the healing of the extraction wound, and in severe cases, may also lead to dry socket syndrome. Therefore, it is not recommended to smoke on the second day after tooth extraction, and at the same time maintain oral hygiene, mouthwash rinse to promote wound healing. An occasional cigarette the day after tooth extraction may dislodge the blood clot and trigger infection in the alveolar fossa, so smoking is not recommended. Smoking is harmful to the body and increases the risk of periodontitis. Smoking is not recommended under any circumstances and should be stopped as soon as possible.