The common causes of oval nodular shadows on the lung lobes are inflammatory nodules in the lungs, tuberculosis nodules, lung cancer nodules and so on. You should consult the doctor in time, improve the relevant examination and clarify the cause of the disease. 1. Inflammatory lung nodules: Inflammatory lung nodules refer to lung infection caused by invasion of various pathogenic bacteria, resulting in the formation of nodules. When inflammatory lung nodules occur, further examination is needed to analyze the causative bacteria, which will provide a basis for the development of treatment. Inflammatory lung nodules are usually treated with medication, such as moxifloxacin, levofloxacin, cephalosporin and so on. 2. Tuberculosis nodules: Tuberculosis nodules are a kind of pathologic change of tuberculosis, after Mycobacterium tuberculosis invades the lungs, resulting in lung lesions and the formation of tuberculosis nodules. Tuberculosis nodules are usually treated by drugs, such as isoniazid, levofloxacin and other drugs. 3. Lung cancer nodules: lung cancer nodules are malignant tumors with complex formation causes, and they have burrs, lobules and concurrent infections. Lung cancer nodules are usually treated by surgery and chemotherapy. If you feel uncomfortable, you should go to the hospital to receive treatment in time so as not to delay your condition. Medicines should be used under the guidance of doctors, avoiding self-medication.