Ground-glass shadow in lungs is generally more important, considering pneumonia, pulmonary edema, lung cancer and other diseases, need to go to the hospital for further examination to clarify the cause of the disease, and then carry out corresponding treatment under the judgment of the doctor in time. 1. Pneumonia: generally due to the irritation caused by inflammation of the lungs, the exudate increases, which causes the phenomenon of broken glass shadow of the lungs, and there will be sputum, cough and other symptoms. 2. Pulmonary edema: it is usually due to the fact that pulmonary edema will cause the fluid in the pulmonary blood vessels to leak out into the interstitium of the lungs, thus causing the phenomenon of ground-glass shadow in the lungs, and pulmonary edema will usually cause dyspnea, coughing up sputum and other symptoms. 3. Lung cancer: It may be due to the presence of cancerous mass in the lungs, which is manifested as ground-glass shadow. Lung cancer usually has symptoms such as coughing and sputum with blood in it. If there is a phenomenon of grinding glass shadow in lungs, you should go to the hospital in time to avoid delaying the condition and adverse consequences.