Bone tuberculosis sinus tracts are sinus tracts formed when Mycobacterium tuberculosis invades bone tissue and forms an abscess that breaks down. Bone tuberculosis is an infectious disease caused by Mycobacterium tuberculosis that invades the bones or joints of the human body, mostly in the spine, knee joints, hip joints and other parts of the human body. A large amount of pus will form in the area infected by Mycobacterium tuberculosis, but it is usually not accompanied by redness and fever, and the channel through which the abscess flows out to the surface of the body or inside the body forms the sinus tract of bone tuberculosis. According to the morphology, it can be divided into straight sinus tract and curved sinus tract, there is no curvature from the mouth to the bottom of the sinus tract, which is called straight sinus tract, and the inconsistency between the exit of the sinus tract and the bottom of the sinus tract with the curvature is called curved sinus tract, which is usually more complicated to deal with, and the appearance of bone tuberculosis sinus tract should be examined by a doctor in time.