Smoking can interfere with wound healing and can even cause wound dehiscence. As a result of smoking, the body’s sympathetic nervous system is excited, which causes the peripheral blood vessels to constrict. This affects the blood supply to the wound, thus affecting wound healing or even non-healing, and in severe cases, even secondary infection and septicemia. Smoking can increase lung or respiratory disorders, causing coughing, coughing up sputum, and even lung infection conditions, leading to increased intra-abdominal pressure. In the case of abdominal surgical incisions, because of the increased abdominal pressure, the incision may be split due to coughing, or in severe cases, even the whole layer may be split. Therefore, smoking can affect wound healing, and in severe cases can even lead to wound dehiscence.