Tuberculosis is a disease that occurs when Mycobacterium tuberculosis invades the lungs. Active tuberculosis must be treated, and the clinical manifestations are different for each person, both light and heavy, as follows: 1. Light patients may not have any symptoms, only found during physical examination, such as college entrance examination physical examination can be found that many high school students have lung shadows without any symptoms; 2. Typical symptoms are coughing, coughing up sputum, low fever in the afternoon, night sweating, and emaciation, etc.; 3. Female patients may have irregular menstruation. 4. Some patients may have Combined with rheumatism, manifested as nodular erythema of the joints, joint pain and so on. If respiratory symptoms symptoms, and for common diseases of the treatment are not effective, must be carried out further examination, usually chest X-ray examination. Patients with shadows on chest radiographs need to further exclude the possibility of tuberculosis, and usually doctors will recommend PPD tests, sputum smears, sputum cultures, etc., and CT lungs if necessary.