A burr in the lung is an imaging manifestation of a group of diseases. A burr in the lung may be a benign nodule or a malignant tumor of the lung. Burrs in the lungs, if they are benign nodules, may be due to inflammatory nodules, fungal infections, sclerosing pneumocytomas, and other lesions that cause burrs in the lungs. It can be treated with medicines such as roxithromycin, cefaclor capsule and albendazole under the guidance of doctor. If the condition is serious, surgery can be performed to remove the lesion. However, if it is a malignant tumor, it may be related to genetic factors, long-term exposure to carcinogenic substances, working environment, smoking, etc. The size and growth rate of the tumor need to be assessed, and surgical resection, chemotherapy and other treatments can be chosen. If burrs are found in the lungs, patients are advised to go to the hospital in time for examination and treatment under the guidance of professional doctors.