In a normal healthy person, multiple pulmonary nodules in the right lung are not very serious nodules if they are found during a physical examination. If the nodule is smaller than 5mm, a regular CT review can be done, once every 6 or 12 months, and if the nodule is larger than 5mm, further tests are needed to clarify the diagnosis. If the patient has underlying disease, such as a previous tumor, it is important to be vigilant if multiple pulmonary nodules are found in the right lung to see if they may be caused by metastases. The severity of the nodule depends mainly on the size of the nodule. If the nodule is larger than 1 cm, or 10 mm, it is important to go to the hospital for further examination to clarify the nature of the nodule. This is because nodules larger than 10 mm have the potential to be malignant, but most nodules are benign. Nodules are defined by imaging. Don’t be nervous about finding lung nodules, just go to the respiratory medicine department normally, and your doctor will give further guidance and tips.