Crystallization in the lungs is just a description of lung pathology. It is detected by X-rays, CT or MRI of both lungs and by bronchial fiberoptic endoscopy. Clinically, lung crystals are mainly caused by calcification and fibrosis of lung tissues, and most of them are inflammatory scars left behind after treatment of inflammatory diseases in the lungs, such as pneumonia caused by Staphylococcus aureus and Klebsiella bacteria, and also seen in tuberculosis caused by Mycobacterium tuberculosis. In addition, some of them can also be seen in silicosis, pneumoconiosis, etc., where the lung tissue is damaged and foci appear.