Tuberculosis, commonly known as “consumption”, is a chronic infectious disease caused by Mycobacterium tuberculosis infection; Mycobacterium tuberculosis may invade all organs of the human body, but mainly invades the lungs and becomes tuberculosis; people do not necessarily develop the disease after infection with Mycobacterium tuberculosis, but only when their resistance decreases; tuberculosis can be prevented and cured. In the following cases, people are prone to tuberculosis: 1, malnutrition, overwork; 2, unstable life, crowded living, air circulation; 3, when using certain drugs, such as corticosteroids, immunosuppressants, etc.; 4, when suffering from certain diseases, such as AIDS, acute lung disease, etc.