Smoking will induce wound infection. If you do not listen to the doctor’s instructions and still smoke after the tooth is removed, the inside of the mouth is likely to be seriously infected and the area where the tooth was removed will secrete white and yellow thick liquid after being infected. Patients will also experience high fever and oral abscesses; 2. Smoking will hinder wound healing, when a tooth is extracted, a wound will follow where it originally grew, if you continue to smoke at this time, it will obviously slow down the healing of the wound and increase the risk of the wound being infected; 3. Smoking will intensify the pain of the alveolar bone, compared to non-smokers, those who smoke more than 20 cigarettes a day Smoking can cause secondary bleeding of the wound, usually within 30 minutes after the extraction procedure, the doctor will place a gauze block in the wound and ask the patient to bite on it until the wound stops bleeding and a blood clot is formed, at which point the doctor will recommend defensive measures to prevent re-bleeding, such as not rinsing hard, not using a straw, and not brushing the teeth too hard. In addition to this, smoking is not allowed, as it can cause the clot to dissolve and cause secondary bleeding.