Lung nodules 4mm generally will not heal on its own. Lung nodules 4mm refers to the diameter of 4mm lung nodules, the cause of the disease is still unclear, if the diameter of 4mm diagnosed as benign, although it will not be self-cure, but generally do not need treatment, need regular review to observe the changes in the nodule. When the nodule is found to be larger than 4mm in diameter and continues to increase, it is necessary to go to the hospital to do lung enhancement CT and nodule puncture biopsy in time, and do the corresponding treatment under the judgment of professional doctors. Generally speaking, benign nodules need to be reviewed regularly, while malignant nodules are more harmful to the body and need to be treated with surgery. In your normal life, you should follow the doctor’s instructions for regular checkups, pay close attention to the changes of the nodules, and consult a doctor promptly if abnormal symptoms such as dyspnea or chest swelling and pain occur.