Is there a small nodule in the lower left lung that is old tuberculosis?

Small nodules in the left lower lung may be old tuberculosis, or other diseases, such as benign tumors, malignant tumors, infectious diseases or others, need further examination to clarify the nature, high-risk groups need to pay attention to. Small nodules in the left lower lung may not be old tuberculosis, but may also be other diseases, the following are some possible causes: 1. Benign tumors: Such as hamartoma, sclerosing hemangioma, atypical adenomatous hyperplasia, etc. 2. Malignant tumors: such as lung cancer, lung metastases, etc. 3. Infectious diseases: such as pneumonia, tuberculosis, fungal infection, etc. 4. Others: such as pulmonary vasculitis, alveolar proteinosis, etc. Therefore, if small nodules are found in the left lower lung, further examinations such as chest CT, tuberculin test, tumor marker test, etc. are needed to clarify the nature of the nodule. If the nodule is old pulmonary tuberculosis, treatment is usually not required, but regular reexamination is needed to observe the changes of the nodule. If the nodule is other diseases, appropriate treatment is required according to the specific conditions. It should be noted that for high-risk groups, such as long-term smoking, family history of lung cancer, occupational exposure history, etc., when small nodules are found in the left lower lung, they should be highly valued and sought medical attention in time for early diagnosis and treatment. At the same time, during examination and treatment, regular medical institutions should be selected, and doctors' recommendations should be followed to actively cooperate with treatment.