Patchy hyperdense shadow in the middle and lower lobes of the right lung is usually described by lung imaging, which mostly suggests that the middle and lower lobes of the right lung have inflammatory lesions caused by various physical and chemical factors, i.e., lung infection, and may be caused by lung tumors and other factors. 1. Lung infection: lung infection is the most common factor of patchy hyperdensity, and it is often necessary to further improve the sputum culture, blood routine, C-reactive protein, calcitoninogen and other indexes, and according to the results of the examination, to further formulate the treatment plan. 2. Lung tumor: early lung tumor blocks the bronchial tubes, causing obstructive pneumonia and patchy hyperdense shadow in the upper lung. Enhanced CT, fiberoptic bronchoscopy, tumor markers and other tests can be further improved to assist the diagnosis. 3. Other factors: old foci left by previous lesions or scars left after inflammation can be left untreated if there are no uncomfortable symptoms, and be reviewed regularly. If the examination finds patchy hyperdense shadow in the middle and lower lobes of the right lung, the patient should go to the regular hospital for further diagnosis and treatment, so as to avoid delaying the condition.