Symptoms of chronic obstructive pulmonary disease (COPD) and malignant lung tumors can occur with long-term smoking, for example, symptoms of COPD include coughing, coughing and shortness of breath, and symptoms of lung tumors include coughing, chest pain, coughing up blood, dyspnea and wasting. Therefore, when patients who have been smoking for a long time develop the corresponding symptoms, they should improve the relevant examinations to clarify the diagnosis. When patients have symptoms of chronic obstructive pulmonary disease, they can improve the lung CT, lung function and other related examinations, and give comprehensive treatment such as anti-infection, expectorant and wheezing according to the condition after the diagnosis is confirmed. When patients have symptoms of lung malignancy, they need to improve lung CT, bronchoscopy, puncture biopsy and other related examinations, and consider surgery, radiotherapy, chemotherapy, etc. after a clear diagnosis.