A large hyperdense shadow in the lower lobe of the right lung is usually considered to be inflammation of the lungs, but may also be a disease such as tuberculosis or a lung tumor. 1. Lung inflammation. Most of them are pneumonia caused by mycoplasma, chlamydia, bacterial infection and so on. The main symptoms of patients are chills, cough, fever, sputum, chest pain and so on. 2. Tuberculosis or lung tumor. If anti-inflammatory and anti-infection treatment has no effect, you need to consider the possibility of tuberculosis or lung tumor and other diseases. Patients need to do PPD test, tuberculosis examination and other tests to confirm the diagnosis of tuberculosis; or do enhanced CT of the lungs, puncture biopsy or bronchoscopy to confirm the diagnosis of lung tumors. It is necessary to go to the hospital in time, to clarify the diagnosis and treatment plan, to use drugs under the guidance of the doctor, and to avoid self-medication.