Lung cancer is one of the malignant tumors with the fastest growing incidence and mortality rates and poses the greatest threat to the health and lives of the population. In recent 50 years, many countries have reported a significant increase in the incidence and mortality of lung cancer, with men accounting for the first place in incidence and mortality of all malignant tumors, and women accounting for the second place in incidence and mortality. The cause of lung cancer is still not completely clear, but a lot of information shows that long-term heavy smoking has a very close relationship with the occurrence of lung cancer. Studies have proven that long-term heavy smokers are 10 to 20 times more likely to develop lung cancer than non-smokers, and the younger the age of starting to smoke, the higher the chance of developing lung cancer. In addition, smoking not only directly affects one’s own health, but also has a negative impact on the health of the surrounding population, leading to a significant increase in the prevalence of lung cancer in passive smokers. Lung cancer is a human “killer”, early detection and treatment is the key, but in fact, early signs of suspicion can be revealed. The clinical manifestations of lung cancer are complex. The presence or absence of symptoms and signs, their severity and their early or late appearance depend on the location of tumor, pathological type, presence or absence of metastasis and complications, as well as the degree of response and tolerance of patients. Early symptoms of lung cancer are often mild and may even be uncomfortable. The symptoms of central lung cancer appear early and heavy, while the symptoms of peripheral lung cancer appear late and light, or even asymptomatic, and are often detected during physical examination. The symptoms of lung cancer are broadly classified into: local symptoms, systemic symptoms, extra-pulmonary symptoms, infiltration and metastasis symptoms. Some of the common symptoms may remind you that lung cancer is beckoning! 1. Shortness of breath Shortness of breath may be a sign of lung cancer. If you have cough for several weeks, whether it is dry cough or cough with sputum, it may be an early sign of lung cancer, and it is recommended to take X-ray film or do CT examination. 2.Flu-like symptoms Most cancers cause fever, usually when the cancer cells metastasize from the original location to other parts of the body. Early symptoms of lymphoma are especially similar to flu, such as persistent fever and pain. 3. Hoarseness If your upper respiratory tract infection symptoms have disappeared but you still have hoarseness for more than 2 weeks and your symptoms continue to worsen, a checkup is recommended. Hoarseness or laryngitis may be an outward sign of laryngeal cancer, lung cancer or even thyroid cancer. 4. Arm pain If the pain in the arm and inside the arm becomes more and more severe with time, it is likely to be caused by swollen lymph nodes pressing on nerves, which is one of the symptoms of lung cancer. This pain is often fixed in a certain location and is similar to nerve pain or arthritis pain. Warm Tips A healthy lifestyle can prevent the occurrence of lung cancer, and together with early detection, early diagnosis and proper treatment, lung cancer can be effectively controlled and treated. In addition, if you find that you are not feeling well, please seek medical attention in time without delay!