Primary treatment TB refers to patients who are found for the first time and have not received any anti-tuberculosis drug treatment, or patients who have been treated with irregular and unreasonable anti-tuberculosis treatment after the discovery of TB, but the course of treatment does not exceed 1 month. However, as long as the patient actively cooperates with the anti-TB doctor and insists on effective, reasonable and complete chemotherapy, the infectiousness can disappear quickly within 2-4 weeks, and the cure rate can be over 95%. The key is to comply with medical advice, obey management, complete the course of treatment, and strive for a complete cure. Retreatment of pulmonary tuberculosis refers to patients who have failed initial treatment or relapsed again, or those who have received irregular and unreasonable chemotherapy for more than one month after detection of tuberculosis. In the practice of prevention and treatment, the condition of relapsed tuberculosis is mostly complicated, often characterized by heavy disease and poor health, mostly caused by irregular or unreasonable chemotherapy (not adhering to treatment as required by doctors or in non-tuberculosis specialized institutions, or even treatment by wild doctors). At this time, TB has already developed drug resistance, so treatment is much more difficult than for primary TB. The key to the treatment of re-treated tuberculosis is to establish confidence in overcoming the disease, actively cooperate with the doctor, choose a chemotherapy regimen consisting of anti-tuberculosis drugs according to drug sensitivity tests, and adhere to the treatment.