Patients with tailbone fracture and dislocation often do not like to sit or even refuse to sit because of the pain in the tail, and would like to rest in bed on their side. Tail fracture and dislocation is more common than sacral fracture, especially in women, common in life and sports accidents. 1, the etiology of the onset of the fall when sitting on the ground, the ground hard object direct impact caused. 2. Pathogenesis is mostly caused by the direct impact of the hip on the ground by the reaction force of the protruding objects on the ground after the fall. Due to the contraction of the coccygeus muscle, coupled with the direction of external force from the lower back, easy to make the distal end of the fracture displaced forward and upward, so that the tailbone on the X-ray film shows a hook-shaped forward bending. However, the anatomical variation of the caudal vertebrae is large, and the sacrococcygeal angle formed by the sacrum and coccyx can vary greatly from an upright position to more than 90°. Therefore, caution is needed in the determination, which must be combined with clinical examination and a detailed history. First of all, it is necessary to get rid of the causative factors and treat the primary disease, and actively prevent and control various infectious foci such as oral infections, skin infections, urinary tract infections, and pneumonia, in order to reduce the incidence of infective endocarditis. Many scholars have found that temporary bacteremia often occurs after tooth extraction, especially in the case of periodontal disease or simultaneous extraction of multiple teeth. Many oral bacteria can enter the bloodstream via the wound, but Streptococcus grasshopperi is the most common. Gastrointestinal and genitourinary trauma and infections often cause enterococci and gram-negative bacilli bacteremia. Staphylococcal bacteremia is seen in skin and infections away from the heart. So from the prevention of bacteremia can be appropriate prophylactic medication, but the use of antibiotics to prevent this disease should be both active and avoid abuse. In addition, it is necessary to adhere to the prevention of the main, to publicize the danger of this disease and advise people to stay away from drugs. For those who have intravenous drug dependence, advise them to actively detoxify, in order to reduce the occurrence of cardiac infective endocarditis. Effective prevention of infective endocarditis is also the main measure to prevent kidney damage.