Inactive pulmonary nodules are also clinically called old pulmonary nodules, which generally do not require medication, but those with recurrent tuberculosis need regular anti-tuberculosis treatment. Old tuberculosis refers to the patient infected with tuberculosis bacillus lesions have not been completely absorbed, but one or more calcified foci, fibrous streaks can be seen on imaging, preferably in the previous tuberculosis patients who have recovered from tuberculosis or after treatment. Patients with old TB usually do not have clinical signs and symptoms, have negative bacteriologic tests, and are not infectious. They usually do not need special treatment, but need to be reviewed regularly as prescribed by the doctor. Obsolete tuberculosis may lead to recurrence of tuberculosis, and once recurrence occurs, it is necessary to carry out regular treatment under the guidance of the doctor, and rational use of isoniazid, rifampicin, streptomycin and other drugs. It is recommended that patients with obsolete tuberculosis maintain a good state of mind and follow the doctor’s instructions to review the disease on time. At the same time, daily life should be appropriate amount of supplemental nutrition, exercise, enhance physical fitness, improve the body’s immunity, in order to reduce the recurrence of the disease.