After wisdom teeth extraction, smoking is not recommended until the wound has healed. Smoking may lead to blood clot detachment, infection and other complications as follows. 1. Blood clot detachment: Smoking action will cause negative pressure in the oral cavity, which may lead to blood clot detachment, causing reactive pain, bleeding, dry socket and other complications, and smoking makes the oral cavity temperature rise, which is not conducive to the formation of blood clots. 2. Infection: Smoking can lead to the deposition of tar in the oral cavity, which can cause irritation to the wound, resulting in chronic infection of the wound, with dark red, loose, edematous inflammatory granulation tissue proliferation, affecting its normal healing. If the above symptoms occur, it is recommended to go to the hospital in time to receive early professional treatment.