The 5mm rounded glassy nodule with clear boundary is generally not serious, considering the possibility of benign nodules, patients do not need to be overly nervous, regular chest X-ray review can be, such as the occurrence of abnormal growth, need to be puncture biopsy in a timely manner to clarify the nature of the nodule. Generally speaking, the doctor will make a simple judgment on the nature of the nodule according to the size, shape and clear boundary of the nodule. 5mm round glass density nodule with clear boundary is considered to be a benign nodule with a greater possibility, and the patient may not undergo treatment if there is no clinical symptom, such as pain, so it can be closely observed. Once an abnormal enlargement or discomfort is found, then it is necessary to carry out a biopsy to clarify the nature of the nodule, and then surgery is required to remove it. Surgery if necessary. It is suggested that in order to avoid the deterioration of the condition, patients should follow the doctor’s instructions and undergo regular checkups.