Grinding glass shadow in the upper lobe of right lung may be lung cancer, and it may also be caused by pneumonia or tuberculosis. 1. Lung cancer: Lung cancer usually has no obvious specific symptoms in the early stage, and some patients may have symptoms such as coughing, coughing up sputum, hemoptysis, chest tightness or chest pain, etc. As the disease progresses, the chest pain will worsen. With the development of the disease, patients will have chest pain aggravated. In the imaging examination, there will be a grinding glass shadow in the upper lobe of the right lung. 2. Pneumonia: Pneumonia will also show glassy images in the upper lobe of the right lung when imaging. Pneumonia may cause coughing and sputum, fever and chills, generalized pain, and some patients may have dyspnea. 3. Tuberculosis: Tuberculosis can also cause glassy nodules in the upper lobe of the right lung, which may be accompanied by chest pain, prolonged low-grade fever, cough, fatigue, hemoptysis and other symptoms. As this is a chronic disease, the symptoms may last for a longer period of time. Patients should go to the hospital in time for treatment when ground glass shadows appear in the upper lobe of the right lung.