Lung nodules with unclear borders and irregular patterns may be malignant tumors. Malignant tumors often appear hard, the surface is not smooth, the border is blurred and so on, the border is not clear is one of the characteristic manifestations of malignant tumors. However, the reverse inference, the border is not clear must be malignant argument can not be established, the lung border is not clear irregular shape may also be some benign tumors, or tissue fibrosis and so on. When you go to the hospital to do a checkup and find that the lung nodule border is not clear and irregular, the test results do not necessarily mean that it is a malignant tumor, but also may be the presence of bacterial infection in the lungs caused by inflammation of the surrounding tissues. Inflammation will cause irritation to the surrounding tissues, making the lung nodule border test result unclear and irregular. It is recommended that patients with irregular lung nodule borders go to the thoracic surgery department or the respiratory department of the hospital, listen to the advice of a professional doctor, and undergo further examination and treatment or regular follow-up observation.