Peripheral lung cancer does not cause obvious coughing symptoms, only central lung cancer, that is, lung cancer above the lung segments, can lead to obvious symptoms of coughing, coughing up sputum and blood in sputum. Because there are no coughing symptoms, peripheral lung cancer is difficult to be detected at an early stage. It is only through regular physical examination that it is easy to find lung occupying lesions, and further pathological puncture biopsy can be done to clarify lung cancer. Therefore, the types of lung cancer that do not cause coughing or those who do not cough also need to have regular low-dose lung CT screening, which can help to detect lung cancer at an early stage. Not every lung cancer patient has coughing symptoms, and whether they will cough or not depends on where the lung cancer occurs and whether it is combined with infection.