Most benign chest diseases or cancers do not always have specific symptoms in the early stage and are mostly detected during health check-ups, and chest X-ray and CT examinations are of great significance. The following symptoms have important warning function, please go to the thoracic surgery department in time to avoid delaying the disease. Cough: irritating dry cough is mostly seen in lung cancer, tracheobronchial tumor, which is not easily controlled by drugs. If repeated pus sputum is present, bronchiectasis and lung abscess need to be considered. Hemoptysis: about half of lung cancer patients have this symptom, which is manifested as persistent or intermittent recurrent small amount of hemoptysis or blood in sputum. Benign diseases such as bronchiectasis and pulmonary isolation can also manifest as hemoptysis in large amounts. Shortness of breath, chest tightness and shortness of breath: commonly seen in chronic obstructive pulmonary disorders, emphysema, etc. Lung cancer complicated with lung infection, advanced stage producing large amount of pleural fluid compressing the chest cavity, and diffuse cancer of both lungs resulting in decreased lung function can all lead to wheezing symptoms. Chest pain: Chest trauma, costochondritis and spontaneous pneumothorax can have chest pain. When the cancer directly invades the pleura, ribs and chest wall, it produces teaching severe chest pain. When uncontrollable severe pain appears, there is almost always extensive pleural or local chest wall invasion, and the prognosis is poor. Dysphagia: It may be esophageal cancer or esophageal smooth muscle tumor. Progressive dysphagia is a typical symptom of esophageal cancer. Vomiting after eating: cardia dysenteria and reflux esophagitis should be excluded. Hoarseness: The cancer metastasis causes enlargement of mediastinal lymph nodes and compression of laryngeal nerve causing vocal cord paralysis, which can lead to hoarseness. Superior vena cava compression syndrome: The cancer compresses the superior vena cava, causing obstruction of blood return, resulting in edema of head, face, neck and upper limbs, and anger of anterior chest veins, causing headache and dizziness. Systemic symptoms: fever, emaciation, cachexia, etc.