The clinical manifestations of lung cancer may include fever. The reasons for the fever include possible infection, fever caused by the tumor itself, and another symptom is hemoptysis. Blood-streaked sputum or hemoptysis is a common symptom of lung cancer, accounting for about 30% of the initial symptoms. The characteristic of hemoptysis in lung cancer is intermittent and persistent, or repeated minor hemoptysis or blood streaks in sputum. Some patients may have large blood vessel ruptures, tumor cavitation leading to bronchial rupture, also causing massive hemoptysis. Some patients may exhibit coughing, with coughing as the initial symptom in about 35%-75% of cases. If a person's cough changes in nature to a high-pitched metallic sound, especially in smokers, it is crucial to be highly alert to the possibility of lung cancer. Another symptom is hoarseness, which occurs in about 20%-30% of lung cancer patients at various stages of the disease.