Nodular hyperdense shadow in the lungs refers to the presence of an unusual lesion in the lungs and is the term used to describe lesions in the lungs. Common causes are tuberculosis, lung infections, old lung lesions, and more. Lung nodularity indicates that the size of the lung lesion is not too large, usually lesions under 3cm are described as nodules, if more than 3cm they are usually described as masses. A hyperdense shadow suggests that the density of the lesion itself may not be low. A solid density nodule, especially a pure solid nodule, is less likely to be malignant; a ground glass density nodule is intermediate in malignancy; and a semi-solid nodule is more malignant. The causes of nodular high-density shadows in the lungs are usually tuberculosis, lung infection, old lung lesions, pulmonary nodular disease, etc. If viral infection is considered, antiviral treatment can be given; if bacterial infection is considered, antibiotic anti-infective treatment can be given; if malignant possibility is considered, early surgical treatment is recommended. It is recommended to find a professional physician to confirm the diagnosis and carry out appropriate targeted treatment.