If there is a nodule on the lung, the first step is to find out the cause of the nodule. If the nodule is caused by inflammation in the lung, anti-inflammatory treatment is needed; if it is a bacterial infection, antibiotic injection is needed for anti-inflammation; if it is a viral infection, ribavirin or Xylazine injection is needed for treatment; if the nodule is caused by mycoplasma infection, this time macrolide antibiotics are needed, such as Azithromycin or erythromycin intravenous drip treatment. In addition, nodules in the lungs may be caused by tuberculosis. If the sputum culture of Mycobacterium tuberculosis is positive, it is necessary to go to a tuberculosis hospital for regular anti-tuberculosis treatment, first for six months, and if the result is not good, 1-2 years of treatment. Another cause of nodules in the lungs may be caused by tumors. If it is a benign tumor, there is no obvious enlargement and the location is good, you can observe it first. If it is a malignant tumor, it needs to be treated with surgery as soon as possible.