The treatment of pulmonary nodules needs to be customized according to the size of the nodules. As long as the nodule does not exceed 5 mm, no treatment is needed. Pulmonary nodule is a multi-system and multi-organ granulomatous disease with unknown etiology. Asymptomatic patients do not need treatment, but can also be treated with methylamine, phosphorus and sulfur. It is recommended to eat lightly and drink plenty of water.