Tuberculosis is an infectious disease of the respiratory system caused by Mycobacterium tuberculosis infection of the lungs. When a cavity appears, it is a serious condition and should be treated immediately. 2. Review the lung CT and liver and kidney functions 1-3 months on the way of medication, and adjust the medication or extend the course of medication appropriately according to the absorption of tuberculosis in the lung. If drug-resistant bacteria are considered to appear, anti-tuberculosis drugs such as levofloxacin and linezolid can be added. 3.