Chest pain, generally refers to chest pain, and the phenomenon of chest pain is not necessarily caused by lung cancer. Lung cancer, also known as primary bronchopulmonary cancer, refers to malignant tumors originated from bronchial mucosal epithelium or alveolar epithelium of the lungs. Chest pain is a common clinical symptom of advanced lung cancer. When the tumor invades the adjacent organs and tissues, patients often feel the presence of hidden pain or dull pain in the chest, and the pain will be intensified when coughing. As a clinical manifestation, chest pain can be caused by angina pectoris, spontaneous pneumothorax, lung cancer, pleurisy, pulmonary embolism, intercostal neuralgia, costochondritis, mediastinal tumor and other cardiopulmonary and thoracic diseases, and some patients suffering from digestive system diseases, such as cholecystitis, esophagitis, esophageal cancer, gastro-esophageal reflux disease, can also have chest pain due to nerve entrapment. When chest pain occurs, should go to the regular hospital in time, under the guidance of professional doctors to clarify the cause of the disease and carry out targeted treatment.