Ground glass nodules 3mm are usually benign and not serious, but if they cause significant clinical symptoms, they need to be taken seriously. Molten glass nodules of 3mm are very small and are considered micronodules. Nodules smaller than 5mm in the lungs are micronodules, more than 90% of which are benign and can be observed in general. If it is a single nodule, it should be reviewed about once a year, and if it is multiple nodules, it can be reviewed once every 3-6 months. If the nodule has not changed, the time interval can be extended accordingly. If the nodule increases in size or the body develops other uncomfortable symptoms, such as dyspnea and respiratory weakness, it is necessary to consult the doctor promptly for examination and the next step of treatment. If there are no clinical symptoms, there is usually no need to worry too much. If you find a 3mm ground glass nodule, we suggest that you go to a regular hospital in time and listen to the advice of a professional doctor.