Smoking is not recommended after a fracture because smoke contains a large amount of harmful substances that may hinder nutrient absorption, affect fracture healing and increase the occurrence of complications, etc. Smoke contains a large amount of coal tar and nicotine, which may cause vasoconstriction and affect blood circulation to the extremities, while fracture healing requires a good blood supply and adequate oxygen supply. Nicotine causes a lack of oxygen to the tissues and therefore may affect bone healing. In addition to affecting fracture healing, nicotine may increase the probability of various complications such as infection and osteomyelitis, increase the rate of incision infection, and increase the risk of necrosis of the skin arc flap. In addition, especially for postoperative pulmonary complications, smoking is an important risk factor that may lead to prolonged hospitalization.