Relapsed tuberculosis is defined as a relapse in a patient who has failed initial treatment or treatment. Or those who have received irregular or unreasonable chemotherapy for more than one month after the detection of tuberculosis. In clinical practice, most of the patients with relapsed tuberculosis have complex conditions, often characterized by heavy disease and poor health, caused by irregular or unreasonable chemotherapy (not adhering to treatment as required by the doctor, or being treated in non-tuberculosis specialized institutions, or even in the wild, or buying drugs from irregular pharmacies). At this time, the tuberculosis bacillus has developed drug resistance, so treatment is much more difficult than for the first treatment of tuberculosis. The key to treating tuberculosis is to establish confidence in overcoming the disease, actively cooperate with the doctor, choose a chemotherapy program consisting of anti-tuberculosis drugs based on drug sensitivity tests, and insist on completing the treatment. Most of the cases are complicated, often characterized by heavy disease and poor health, and are caused by irregular or unreasonable chemotherapy (not adhering to treatment as required by doctors or treatment in non-tuberculosis specialized institutions, or even wild medicine, as well as buying drugs from irregular pharmacies). At this time, the tuberculosis bacillus has developed drug resistance, so treatment is much more difficult than for the first treatment of tuberculosis. The key to treating tuberculosis is to establish confidence in overcoming the disease, actively cooperate with the doctor, choose a chemotherapy program consisting of anti-tuberculosis drugs according to the drug sensitivity test, and insist on completing the treatment.