The probability of malignancy of lung nodules with burrs is around 30%. 80% of lung nodules are benign, malignant nodules are relatively rare, but if there is a burr on the lung nodule, the possibility of malignancy is relatively large, may be due to the formation of nodules in the lung tissue after the formation of oedema between the lung lobules, in the CT image shows burr-like changes, the burr is divided into a short burr and a long burr, burr shorter burr may be the malignant manifestation of lung stones, a very long burr may be due to pneumonia, it is recommended to check the tumor marker It is recommended to check tumor markers, blood tests, etc. If lung nodules are found, it is recommended to consult a doctor in time and follow the doctor’s instructions for standardized examination and treatment. Meanwhile, regular follow-ups should be conducted to closely monitor the changes of lung nodules.