Benign pulmonary nodules are nodules within the lungs that are benign in nature and do not spread far and endanger life and health. A pulmonary nodule is an intrapulmonary lesion that is round, oval, up to 3 centimeters in diameter, opaque, and surrounded by lung parenchyma that is detected on a CT scan of the chest. Nodules can form in many diseases within the lungs, many of which are benign, such as fungal infections, misshapen tumors, inflammatory pseudotumors, and sclerosing pneumocytomas. If the benign nodules are small and slow-growing, they do not require special treatment. Every three to six months or so, you need to go to the hospital for a follow-up chest CT to determine if the nodule has changed. If the nodule changes, such as increasing in size, surgical treatment may need to be considered to remove the nodule before it gets worse and becomes life and health threatening. Avoid smoking in general and maintain a good living environment to minimize inhalation of dust and other irritating gases.