High density shadow of lungs refers to the increased density shadow of lungs seen through chest X-ray or chest CT examination, which may be mainly due to infection, tuberculosis, tumor and so on. 1. Lung infection: when the lung due to bacterial infection caused by lung inflammation, such as lobar pneumonia will show a large area of high density shadow in the chest X-ray, this time this time actively anti-infection treatment, such as oral amoxicillin capsules, cefprozil tablets, etc., if necessary, can be static point. 2. Tuberculosis: when the body due to Mycobacterium tuberculosis infection caused by tuberculosis, can also be presented in the lung tip and other parts of the dense shadow, this time isoniazid, rifampicin and other anti-tuberculosis treatment. It is also possible that the tuberculosis has been improved, but the lesion is calcified, which can also be shown as high density shadow. 3. Tumor: for example, lung cancer can also show high density shadow, which can be treated by surgery or chemotherapy. Dense shadows in the lungs need to be taken seriously, and relevant examinations should be carried out to clarify the diagnosis and treatment. Drugs should be used under the guidance of doctors, avoid self-medication.