The main reason why patients with lung nodules have recurrent coughing symptoms after surgical removal of lung nodules is that surgery for lung nodules is an invasive procedure, which after all damages the mucous membrane of the lung. However, the mucous membrane of the lung is damaged and will repair itself. There are different degrees of congestion, edema, and even exudation of inflammatory secretions at the surgical site, so these reactions can stimulate the mucous membrane of the lung and lead to recurrent coughing symptoms. Some patients may also have chronic bronchitis, which is not relieved by the surgery of pulmonary nodules, and may choose nebulizer inhalation therapy and cough medicine to relieve the symptoms.