Tuberculosis is a respiratory infectious disease caused by Mycobacterium tuberculosis infection, and there is no clinical term for the three major manifestations of an improving tuberculosis lesion. After standardized and systematic drug treatment and/or surgical treatment, the lesions usually show a certain degree of improvement, which can be judged mainly by symptom improvement, sign improvement and imaging changes: 1. Phenomena usually indicate that the patient’s tuberculosis symptoms are improving; 2, signs of improvement: when the tuberculosis lesions are small, changes in signs are not obvious, and it is not easy to determine whether they are improving. When TB lesions are obvious, changes in signs may occur, such as a decrease in pleural effusion; 3. 5. Sputum bacillus results: If the patient undergoes sputum Mycobacterium tuberculosis examination, such as sputum bacterial culture or sputum tuberculosis smear examination, which is found to be positive to negative, it also indicates the improvement of pulmonary tuberculosis. In addition, according to the complexity of clinical symptoms of different patients, bronchoscopy and other options are also available to determine whether the tuberculosis appears to be improving according to the test results. After the improvement of the lesion, the medication should not be stopped immediately, but should be taken according to the doctor’s prescription and in accordance with the dosage and treatment schedule.