Irregular soft tissue density foci in the lungs, accompanied by elongated burrs, is a description of the lesions in the lungs in CT examination, and the causes of the corresponding conditions mainly include lung cancer, tuberculosis and mycobacterial infections, and so on. 1. Lung cancer: it is the most common cause of the corresponding condition. The uneven growth rate of tumor cells will lead to corresponding changes in shape and edge. 2. Tuberculosis: tuberculosis forms caseous granulomatous tissue, and the lesion causes pulling and stimulation to the surrounding tissues, which will lead to the corresponding condition, partly accompanied by satellite foci in the surrounding. 3. Mycobacterial infection: mycobacterial infection will form mycobacterial ball, there will be corresponding conditions, the edge of the corresponding lesion is blurred, and mycobacteria to the surrounding infiltration. Found related foci, should be timely to the hospital for medical examination, diagnosis of the condition to do standardized treatment, to avoid delaying the condition.