The most common types of lung cancer include: 1. squamous carcinoma: squamous carcinoma is mainly central type lung cancer, which is characterized by irritating dry cough, then blood in the sputum, and more serious hemoptysis at the later stage, and even blockage of airway caused by blockage pneumonia after the lump grows. The main feature of adenocarcinoma is that some patients with adenocarcinoma can be treated with targeted drugs after genetic testing; 3.Large cell lung cancer; 4.Small cell lung cancer: small cell lung cancer is the most malignant type of lung cancer and is prone to distant brain metastasis, bone metastasis, and upper neck metastasis. Small cell lung cancer is the most malignant type of lung cancer and is prone to distant brain metastases and bone metastases, as well as lymph node metastases in the upper mediastinum of the neck.