Secondary tuberculosis does not usually heal on its own. Tuberculosis is a respiratory transmission disease caused by Mycobacterium tuberculosis, which can involve many organs, and its basic pathological features are exudation, caseous necrosis, and proliferative tissue reaction, which can form cavities, manifested by systemic symptoms such as low-grade fever, lethargy, and malaise, and respiratory system manifestations such as cough and hemoptysis. If diagnosed in time and given reasonable treatment, most of them can be clinically cured. Commonly used drugs in the treatment of tuberculosis are isoniazid tablets, rifampicin capsules, pyrazinamide tablets, ethambutol tablets, etc., which need to be taken in strict accordance with the principles of early, combined, appropriate amount, regularity, and the whole course of treatment. The first two months of anti-tuberculosis treatment is a period of high incidence of liver function damage, and liver and kidney functions should be rechecked during the period of taking medication to prevent it from happening.