What are the early symptoms of lung cancer

Lung cancer is the most common malignant tumor of the lungs. According to the World Health Organization, the incidence of lung cancer ranks first among malignant tumors in many countries and regions. It is more common in men than in women, with a male-to-female ratio of about 4-8:1. It is more common in cities than in rural areas. Most patients are over 40 years old, and a few are under 40 years old. The vast majority of lung cancers originate from the bronchial mucosal epithelium, so it is called bronchial lung cancer. Common early manifestations of lung cancer include:

① Cough. Lung cancer grows on bronchial lung tissue, which usually causes respiratory irritation symptoms and irritating cough.

② When a low-fever tumor blocks the bronchus, obstructive pneumonia often occurs with varying degrees. Mild cases may only have a low fever, while severe cases may have a high fever. The condition may temporarily improve after taking medication, but will soon relapse.

③ Chest pain. In the early stages of lung cancer, chest pain is mild and mainly manifests as dull pain. The location is uncertain and the relationship with breathing is uncertain. If the pain persists, it means that the cancer may have affected the pleura.

④ Blood in sputum. When tumor inflammation causes tissue necrosis and capillary damage, there will be a small amount of bleeding, which is often mixed with sputum and appears intermittently or intermittently. Many lung cancer patients seek medical treatment because of blood in sputum.