Smoking is not recommended for open wounds to avoid affecting the cardiovascular system, immune system and respiratory system, etc. Cigarettes contain a lot of harmful substances such as nicotine, which when entering the bloodstream will cause vasoconstriction, reduced blood supply, lack of nutrients and oxygen to the wound, and prolong the healing time of the wound. It may also lead to thrombosis or embolism, resulting in cerebral thrombosis and lower limb thrombosis, with serious consequences. Smoking decreases the body’s immune system, which may cause infection of the wound, leading to poor wound healing and even causing systemic infections. Smoking will lead to tracheal spasm and repeated violent coughing, which will affect wound healing and increase the chance of pneumonia infection. Therefore, it is recommended to quit smoking as soon as possible to avoid affecting the patient’s health.