There is no research showing that lung cancer patients will have tongue symptoms. Lung cancer patients mainly show respiratory symptoms in early and middle stages, and when metastasis occurs in late stages, there will be corresponding metastatic manifestations. In the early stage of lung cancer, there are no obvious specific symptoms, which can be manifested as prolonged dry cough, chest tightness, chest pain, shortness of breath, hemoptysis, etc. When combined with infections, fever and aggravation of cough and sputum can occur. At present, it has not been found that lung cancer patients will have tongue changes. When lung cancer spreads locally or metastasizes to distant organs, it may cause corresponding metastatic symptoms, such as chest pain when invading the pleura, hoarseness when compressing the recurrent laryngeal nerve, dysphagia when compressing the esophagus, pain and numbness of one side of the upper limb when compressing the brachial plexus nerve, etc. Patients suspected of having lung cancer are recommended to have it as soon as possible. If lung cancer is suspected, it is recommended to go to the hospital as soon as possible to improve chest CT, bronchoscopy, tumor markers and other related tests, so as to make a clear diagnosis as soon as possible and then treat it in time.