Small nodular hyperdense shadow is mostly calcified tissue deposits, lungs, thyroid gland, liver and other different parts of most of the small nodular hyperdense shadow can appear. Lung nodules: Small nodular hyperdense shadows in lung nodules are mostly caused by inflammation stimulation, and most of the reports show that the size of most of them is around 1cm, and the density is higher than that of normal tissues. If they are not accompanied by other clinical symptoms such as coughing and sputum, they can be monitored regularly and do not require any special treatment. At the same time, differential diagnosis should also be carried out to exclude whether it is non-inflammatory disease caused by small nodular high-density shadow in the lungs, 3-6 months follow-up to observe whether the shadow increases can be identified. 2. Thyroid hyperdense shadow: If there is a nodular hyperdense shadow in the thyroid gland, which is hard and not smooth, there is a possibility of thyroid cancer, which can be diagnosed by ultrasound of the thyroid gland, and if the thyroid gland is graded more than grade 4, the thyroid gland can be further puncture and biopsy to make a clear diagnosis. 3. Liver nodular hyperdense shadow: If there is a nodular hyperdense shadow in the liver, it may be simply a calcified foci, but we should also pay attention to whether this nodular hyperdense shadow is new-onset and whether it will increase in size, and we should go to the hospital in time if there is a progressive increase in size.