Lung nodules and hyperdense shadows are different ways of describing the lesions in the lungs in CT examination, which cannot be compared in terms of severity, and need to be combined with other indications to make a comprehensive judgment. 1. Lung nodules with small size, smooth edge, uniform density and clear demarcation with neighboring tissues are likely to be benign lesions, and the corresponding condition is not serious; lung nodules with irregular morphology, irregular edge and malignant signs such as burrs, lobes, pleural pulling and vacuoles are more serious and need to be actively dealt with. 2. High-density shadow in the lungs with sharp edges, strip-like changes, and pulling of neighboring lung tissues are likely to be old lesions, which are not serious; blurred edges and bronchial insufflation signs are likely to be inflammation, which are also not serious; irregular shape of high-density shadow, irregular edges, and malignant signs such as vascular cluster signs and pleural pulling are likely to be seen, which are more serious conditions. Overall, both lesions have more serious conditions, and it is not possible to directly compare which one is more serious, and it is necessary to combine the clinical symptoms and other indicators to make a comprehensive judgment, and if necessary, it can be diagnosed by puncture biopsy, and standardized treatment can be carried out under the guidance of clinicians.