A sub-solid nodular shadow with a diameter of about 6mm is seen in the anterior basal segment of the lower lobe of the left lung, which does not exclude lung cancer or lung nodule. If the border around the nodule is not clear, it is likely to be a sign of lung cancer, and the patient will often have symptoms such as dry cough, fatigue, and chest pain. This condition may also be seen in the formation of lung nodules, which may be caused by infection or excessive inhalation of dust. As the nodular tissue continues to grow, the patient may suffer from persistent cough, hemoptysis, and chest tightness. The sub-solid nodular shadow with a diameter of about 6mm in the anterior basal segment of the lower lobe of the left lung may be caused by different diseases, and pathological biopsy can be performed in time to clarify the specific nature of the tissue in time, and it is necessary to consult a doctor in time to receive the correct treatment, and timely surgical resection of the diseased tissues can be considered, and the later stage of the disease should pay attention to the regular review, so that there can be a better prognosis.