Smoking is usually not allowed after tooth extraction. After tooth extraction, the wound will have edema, pain, and blood clot formation. Tobacco contains nicotine and other harmful ingredients, which can cause irritation to the wound and affect the coagulation function of the wound site, causing bleeding and adversely affecting the wound healing, and in severe cases, infection can occur and affect the healing speed. Therefore, you can’t smoke after tooth extraction. Be careful not to lick the wound with your tongue or suck on it after tooth extraction. Consequences are hard to avoid when smoking. This is one of the reasons why you should not smoke after tooth extraction. After tooth extraction, attention should be paid to dietary adjustment, usually can not eat within 2 hours, after 2 hours can enter the liquid food, should not eat too hot, too hard, spicy and stimulating food, 2 ~ 3 days later gradually return to normal diet. After tooth extraction should pay attention to dietary adjustments, reduce smoking, drinking and other bad habits, and maintain good oral hygiene.