Lung space-occupying lesions include: lung abscess, tuberculosis ball, lung cancer and so on. Symptoms include cough, sputum, fever, chest pain, hemoptysis and so on. 1. Lung abscess: lung abscess is a type of lung infectious disease, the main symptoms are high fever, rapid pulse, fatigue and other systemic infections, cough, cough a lot of pus sputum, etc., and chest pain can occur when the pleura is involved. 2. Tuberculosis ball: Tuberculosis ball is a well-bordered lesion formed by the proliferation of fibrous tissue wrapped around the necrotic foci of tuberculosis. Patients often have a long-term history of tuberculosis, with symptoms of tuberculosis toxicity and coughing and coughing up sputum such as low-grade fever, night sweating, malaise and emaciation, and some of the patients may suffer from a small amount of hemoptysis, and hemoptysis is relatively rare. 3. Lung Cancer: At the early stage of lung cancer, there is no obvious specific performance, and it is mostly manifested as irritating dry cough of unknown cause for a long time. When causing obstructive pneumonia, cough and sputum may appear. As the disease progresses, patients may have a series of compression or metastatic symptoms, such as dyspnea caused by compression of trachea, pain and numbness of one side of upper limb caused by compression of brachial plexus nerve, and pain or even pathologic fracture when bone metastasis occurs. In addition to the above causes, lung space-occupying lesions may also be benign lung tumors, lung parasitic infections, inflammatory hyperplasia, etc., with different symptoms. It is recommended that the patient go to the hospital as soon as possible to have the nature of the occupying lesion clarified in time and then give targeted treatment.