Tuberculosis is a systemic chronic infectious disease caused by Mycobacterium tuberculosis through the respiratory tract, with pulmonary tuberculosis being the most common, and the main lesions are tuberculosis nodules, infiltration, caseous changes and cavity formation. Clinical manifestations are often long-term low-grade fever, sputum, hemoptysis, etc., tuberculosis patients, long-term discharge of open tuberculosis patients is the main source of infection, regular chemotherapy 2-4 weeks later, with the reduction of sputum discharge and the infectiousness of the reduction. The usual way of transmission of tuberculosis is airborne, for example, patients with tuberculosis cough, sneeze, speak loudly, the exhaled gas will contain tuberculosis bacilli droplets spread, healthy people inhalation can cause infection. The population is generally susceptible, infants and young children, late adolescence and the elderly high incidence; diabetes, silicosis and whooping cough, overexertion, pregnancy and so on are also prone to induce tuberculosis, malignant tumors, renal transplants, liver transplants, and patients with AIDS may also develop tuberculosis.