With the influence of aging population, air pollution and other factors, the incidence rate and mortality rate of lung cancer in China have been on the rise, seriously threatening people’s health and life. As we all know, early detection and early treatment is the best way to deal with lung cancer. What are the common signals that help us achieve early detection? 1.Continuous coughing As the tumor grows on the large bronchial tubes, which is highly irritating, it is easy to produce coughing, but the degree of coughing varies. However, the degree of coughing varies. those who are above 40 years old, with smoking history and family history of lung cancer, should be alert to the persistent coughing! Hoarseness Coughing is not cured and hoarseness is seen in upper respiratory tract infection, which is also one of the clinical manifestations of lung cancer. Those who can not be relieved after treatment should beware of lung cancer! Coughing up blood or sputum with blood can be manifested as hemoptysis or occasional bloody sputum. Any chronic cough with hemoptysis is recommended to be carefully investigated and not to be neglected! 4, chest pain Chest pain vaguely, even chest pain pull back, this situation is more common in the elderly. Therefore, chest pain in the elderly should not be taken seriously. 5, unexplained fever Fever from time to time, irregularity. Some cancer patients will have fever because of obstructive pneumonia or tumor releasing thermogenic factors to produce tumor fever. Therefore, fever is an early manifestation of some lung cancer patients. Increased CEA CEA, also known as carcinoembryonic antigen, has significantly higher value, which suggests malignant tumor of digestive tract origin, but it may also be lung cancer. Lung cancer has different symptoms due to its different locations and different functional damage. In addition to the above symptoms, many patients do not have any obvious early symptoms and can only rely on regular checkups to find out their lesions at an early stage. Doctor’s Tip Since lung cancer has no typical early clinical symptoms and lacks specific examination means, many patients are already in advanced stage of lung cancer when they arrive at the clinic for diagnosis, which is one of the important reasons for the high mortality rate of lung cancer. Early detection of lung cancer can significantly improve the five-year survival rate of patients. Therefore, once patients find the above mentioned lung symptoms or other discomforts, they should seek medical treatment in time and do not miss the best treatment period.