Ground-glass nodules in the basal segment of the lower lobe of the right lung may be caused by pneumonia, pulmonary hemorrhage or lung cancer. 1. Pneumonia: it can cause ground-glass nodules in the basal segment of the lower lobe of the right lung, accompanied by acute symptoms such as cough, sputum, fever and wheezing. 2. Lung hemorrhage: similar symptoms can occur when there is bleeding in the lungs due to various reasons, which can be accompanied by cough, sputum, dyspnea and so on. 3. Lung cancer: if the basal segment ground glass nodule in the lower lobe of the right lung lasts for a long time and cannot be eliminated or absorbed by itself, lung cancer is more likely. It is accompanied by cough, blood in sputum, chest pain, progressive weight loss and other symptoms. There are other possibilities for right lung basal segment ground glass nodule, so it is recommended to consult a doctor in time, complete other examinations, and cooperate with doctor’s treatment if necessary.