Glassy hyperintense shadows in both lungs are often seen in patients with lung infections, pulmonary edema, fibrosis, and lung tumors, as well as in those who have smoked for a long period of time or inhaled polluted air. 1. Lung infection: in clinic, it is mostly seen in lung infection caused by bacteria, virus, mycoplasma, chlamydia and other disease-causing microorganisms. Lung inflammation can lead to nodular shadows in the lungs, which can be manifested as ground-glass-like high-density shadows in the translucent state. 2. Lung edema: lung infection, mitral valve stenosis can lead to edema of the lungs, which can be presented as glassy hyperdense shadows of both lungs during CT imaging examination of the lungs. 3. Lung fibrosis: it is common in the interstitial tissue of the lungs due to inflammation, trauma and other pathological changes, which can present double lungs with glassy hyperdense shadow, the disease progresses slowly and cannot be cured. 4. Lung cancer: lung cancer patients can cause exudation and necrosis of lung cells and interstitial cells, and the imaging manifestation can show ground-glass-like high density shadow, and puncture biopsy and other tests are needed to confirm the diagnosis, but it is rare to see both lungs, and it can be seen in metastatic lung cancer. However, it is rare to see it in both lungs, and it can be seen in metastatic cancer. Ground-glass-like high density shadow can also be seen in non-disease factors, especially in patients who have been smoking for a long time and inhaling polluted air, and it is recommended to go to the hospital for further improvement of the examination in order to clarify the cause.