Calcification of pulmonary nodules can be determined by lung X-rays or CT examinations. If the images show strongly echogenic or hyperdense images resembling stones, and the density of the calcified foci is relatively high, calcification of pulmonary nodules may be present. A pulmonary nodule is a nodular lesion smaller than 3 centimeters in the lung. Calcification is a metamorphic lesion, meaning that the damaged tissue breaks down, causing a change in local pH, and calcium ions are deposited in the form of calcium phosphate or calcium carbonate. Calcification of lung nodules is best diagnosed by a combination of clinical manifestations, imaging tests and other auxiliary tests. Nodal calcification is usually a benign lesion, indicating loss of activity of the lung lesion. When the nodules are small, they can be left untreated; if they are large, surgery can be considered. Treatment should be carried out under the guidance of a doctor, do not use medication privately, as it may cause danger.