Lung mass is a round-like shadow with a diameter of more than 3cm and clear margins, which can be seen in benign tumors, malignant tumors and non-tumorous lesions. 1. Benign tumors: such as common inflammatory pseudotumor, can be identified by puncture biopsy or PET-CT, after clarifying that there is a bacterial infection, generally give anti-infective treatment and then review, the drug can be used piperacillin sulbactam, moxifloxacin and so on. 2. Malignant tumor: mostly seen in middle-aged and old-aged patients, including lung cancer and other parts of the tumor metastasis to the lungs, chest CT and puncture biopsy can confirm the diagnosis, and need surgery, radiotherapy, targeted and other comprehensive treatment. 3. Lung tumor lesions. ① Pneumoconiosis: mostly seen in workers who have contact with dust and other occupations. Chest CT can identify the disease and biopsy can confirm the diagnosis if necessary; no special treatment is needed for mild disease, and lung washing and respiratory support are needed for serious disease. ② Tuberculosis: most common in young and middle-aged patients, caused by infection with Mycobacterium tuberculosis, combined with chest radiographs, bronchoscopy and sputum culture to determine the synthesis, the need to use rifampicin, isoniazid and other drugs anti-tuberculosis treatment. If you find lung mass, you need to consult a doctor in time, after clarifying the nature of the mass, you should take active treatment. The above drugs should be used under the supervision of a doctor.