Many people think that the early symptom of lung cancer is coughing, but in fact, hoarseness is also a very important early symptom of lung cancer. Hoarseness can occur after laryngitis, cold and acute bronchitis, thyroid surgery, pharyngeal surgery, improper vocalization and excessive speech, or even heavy smoking and drinking. However, this type of hoarseness can usually be treated symptomatically or cured spontaneously with rest. The hoarseness caused by lung cancer, thyroid cancer and laryngeal cancer is completely different from the above type of hoarseness, especially the lung cancer is more prominent. According to statistics, about 20%-30% of lung cancer patients can have hoarseness at different stages of the disease, including the early stage, and among them, central lung cancer can be as high as 40%. The pathology of hoarseness caused by lung cancer is that the cancer invades and compresses the nerves that govern the vocal cords, and such hoarseness often occurs suddenly, progresses rapidly, or even completely loses voice, while most patients are accompanied by chest pain and so on. Early symptoms of lung cancer: coughing and coughing up blood Lung cancer has different symptoms due to its different locations and functional damage. As the tumor mostly grows on the large bronchial tubes and is highly irritating, it is easy to produce cough. However, the degree of coughing varies. About 50% of patients have irritating choking cough with no sputum or little white foamy sputum. The quality of the sputum changes after secondary infection. People with a pre-existing chronic cough should be alerted if they notice a different nature of cough than usual. Patients with a high incidence of age should be seen early if the cough is ineffective after treatment or persists for a long time. Those with coughing blood should be diagnosed early. The next symptom of lung cancer is coughing up blood. This is the most important symptom. Tumor invasion and destruction of capillaries in bronchial mucosa or rupture of blood vessels in tumor tissues can cause blood in sputum, which is mostly fresh blood or blood spots in sputum, intermittently or repeatedly. In early stage lung cancer, there are few cases of coughing up blood in the whole mouth. Coughing up blood is more likely to cause patients to pay attention to it than other symptoms, so that early lung cancer can be detected by further examination. Symptoms of lung cancer: Joint pain If the knee joint is inexplicably swollen and painful, it is the metabolites of cancer. Besides knee joint, shoulder joint pain is another manifestation of lung cancer. According to the statistics of orthopedic surgeons, they have to transfer a dozen of patients from orthopedic department to oncology department every year, all of them come to orthopedic department because of shoulder pain. This is the most likely cause of misdiagnosis. Early symptoms of lung cancer are usually coughing, coughing up blood, hoarseness, chest pain, etc. However, there are also some symptoms that are difficult to identify, but for the prevention of lung cancer, we should insist on medical checkups, especially for old smokers and people with a history of chronic lung disease. Quit smoking, smoking is really bad for your lungs! It is recommended that a packet of tiger milk mushrooms every day, to maintain the lungs