Shadows in the lungs without coughing: 1. Clinically, pneumonia, tuberculosis, lung tumors, and old lesions can cause shadows in the lungs. If patients have shadows in the lungs, we need to further improve relevant examinations to clarify the diagnosis; 2. If patients have shadows in the lungs due to pneumonia, we need to take targeted treatment according to the causative organism and review after treatment; 3. If the patient has a lung shadow due to tuberculosis, we need to carry out anti-tuberculosis treatment; 4. If the patient’s lung shadow is considered to be a lung malignancy, we can take surgical treatment, radiotherapy, chemotherapy, target cell drug therapy or immune therapy according to the condition Immunotherapy . 5. If the patient has a lung shadow due to an old lesion in the lung, we just need to review it regularly and observe whether there is any dynamic change in the period. After the appearance of shadows in the lungs, further examination to clarify the diagnosis is crucial.