Lung nodules with burrs may be caused by infections, tuberculosis and lung tumors. 1. Infection: Infectious lesions in the lungs can also be manifested as nodules in the lungs, especially chronic inflammation, which can be manifested as nodules with coarse burrs in the lungs. 2. Tuberculosis: Patients with tuberculosis due to Mycobacterium tuberculosis infection may present with imaging changes such as lung shadows and nodules with burrs. Usually the burrs are long. 3. Lung tumors: especially malignant tumors, often show nodules with burrs, lobulation and other phenomena. Lung nodules with burrs can also be caused by other reasons. It is recommended that patients should go to regular hospitals for further examination when there are nodules with burrs on the lungs, identify the cause of the disease, and then carry out treatment under the guidance of professional doctors.