Whether a small nodular shadow 1.3*1.4 in the lower lobe of the right lung is serious cannot be generalized. For example, it is mostly not serious if it is caused by inflammation, etc. It may be serious if it is a tumor lesion. 1. Unserious cases: If it is due to congenital factors, or tuberculosis, pneumonia and other reasons for the formation of fibrous scarring during the recovery period caused by small nodules, there are no other changes, generally not serious. 2. Possibly serious cases: If the nodules in the lower lobe of the right lung are caused by malignant tumors such as lung cancer, it is a serious case with a higher risk of disease progression. Surgery should be performed as soon as possible and treatment should be based on postoperative pathology with chemotherapy and radiotherapy. If you find a small nodule of 1.3*1.4 in the lower lobe of the right lung, you need to go to a regular hospital for further examination and take appropriate treatment measures according to the doctor’s advice.