Acute septic osteomyelitis occurs mainly in the epiphysis of long tubular bones, most commonly the tibia and femur, the thigh bone and calf bone; followed by the humerus, radius and ilium, the bones of the upper limbs. The pathway of invasion of osteomyelitis bacteria is, first of all, the presence of infectious lesions in other parts of the body, the primary lesions are not identified, and can be clearly described at most 35%, generally not clear, are skin or mucosal infections, such as boils, carbuncles, tonsillitis or otitis media, the primary lesions are not handled properly, or when the body resistance is reduced, the bacteria from the primary lesions will enter the blood, causing bacteremia and sepsis. After the bacteria enter the nutritive artery of the bone, because the epiphysis of the long tubular bone, which is also the two ends of the bone, has a slow blood flow, the bacteria can easily stay in this place, thus forming a focal point of infection, and thereafter the bone around the abscess will mostly show severe sepsis because of poor drainage.