Bilateral lung punctate high-density foci is a kind of lung imaging results, belongs to the lung nodule, commonly found in lung infection as well as lung tumor, old tuberculosis and so on. 1. Lung infection: Lung infection will cause patients to have fever, chest tightness, cough, sputum, fatigue, loss of appetite and other symptoms. When the blood routine examination is conducted, the total number of white blood cells will be high, and when the imaging examination is conducted, the findings of point-like high density foci in both lungs will appear. Usually, it needs anti-infection and other treatments, such as penicillin for bacterial infections. 2. Lung tumor: when there is a tumor in the lungs, this kind of test result will also be shown. Lung tumors include malignant and benign, and usually do not show obvious symptoms in the early stage, and the patients can be treated by surgical resection of the foci and so on. 3. Old tuberculosis: when old tuberculosis undergoes imaging examination, it will also show the result of bilateral punctate high-density foci in the lungs, and the patients usually have no other obvious accompanying symptoms, and generally do not need special treatment. Double lung punctate high density foci may also be other causes, please consult the hospital in time to avoid delaying the condition. The above drugs should be used under the guidance of a doctor.