Usually, lung nodules are not necessarily left behind after pneumonia is cured, and if they are present, they usually do not exceed 3 cm. Lung nodular lesions due to pneumonia are usually inflammatory lesions due to unabsorbed lesions or tissue proliferation during healing. Inflammation of the lungs may lead to nodular and multinodular changes in the lungs, and there is no certainty as to when they will go away, and in some patients the nodules in the lungs may never go away. Lung nodules caused by pneumonia are usually benign. The lung nodular lesions are left behind, and the clinical size of the lung nodules usually does not exceed 3 cm, and some of the small nodules are reabsorbed over a period of time. Patients with nodules in the lungs after pneumonia need to be reviewed regularly in order to observe the changes and dynamics of the nodules. As long as the patients do the appropriate care measures, generally will not affect the health. Nodules left behind after pneumonia is cured, usually do not need to worry too much, if you find new nodules that continue to grow, you need to consult a doctor in a timely manner.