According to Chinese medicine, the lungs are at the top of the five viscera and are connected to the outside world through the mouth and nose. The lungs are delicate and do not tolerate heat or cold, so they are the most susceptible to evil, mainly manifested by coughing and coughing up phlegm. Chinese medicine believes that there are many causes for coughing and coughing phlegm, as stated in the Nei Jing, “All the five internal organs and six internal organs cause coughing, not only the lungs.” In Western medicine, symptoms of cough can also be found in colds, bronchiectasis, chronic obstructive pulmonary disease, asthma, tuberculosis, lung cancer, etc. So, what kind of symptoms should we pay attention to? Early diagnosis is the key The latest data shows that about 600,000 people die of lung cancer in China every year, and the authority predicts that the number will exceed 800,000 by 2020. The urbanization, modernization and industrialization in China have destroyed the environment, leading to air pollution and haze; there are many smokers in China, and more passive smokers; we breathe in these harmful substances every day, and it is inevitable that we will inhale these harmful substances, which are all risk factors leading to lung cancer, and the key to treat lung cancer is early diagnosis. Early diagnosis of lung cancer is difficult because there are no biochemical indicators to confirm the diagnosis of lung cancer, and the effect of chest X-ray in regular physical examination is not ideal for early detection of lung cancer, so both patients and doctors should pay attention to the following 6 risk factors if they exist. Then, what are the early clinical manifestations of lung cancer? 1. Long-term cough The patient in the case mistook the cough caused by common cold and kept treating it as a cold, delaying the disease for up to three months. Especially in spring and poor air quality, it is easy to misdiagnose and miss the diagnosis. If the patient’s cough lasts for more than three weeks, it must be taken seriously. 2.Blood in sputum or hemoptysis is a common symptom of lung cancer. 3. Chest pain and chest tightness This symptom is easily thought to be caused by old age, poor physical fitness or obesity. If there is no cardiovascular disease, screening for lung cancer needs to be paid attention to. 4.Bone pain Lung tumor may easily metastasize to a bone or joint in the body, which may compress the nerve and destroy the bone, causing pain in shoulder, chest, waist, back or arm and leg. Up to 50% of lung cancer patients have bone pain symptoms at the time of being diagnosed. 5.Recurrent fever and pneumonia If the tumor is close to the airway, it can cause airway obstruction triggering lung infection. 6. Abnormal symptoms or loss of body mass Sometimes seemingly unrelated symptoms are also associated with lung cancer, especially in patients who smoke, such as loss of appetite and weight loss; statistics show that 25% of lung cancer patients have no specific symptoms when they are diagnosed with lung cancer, and many of them are discovered only when they undergo CT or X-ray examinations for other reasons.