After a fall and sit on the ground, there is a possibility of tailbone fracture. After a fall buttocks on the ground, due to the weight of the entire body are located in the sacrococcygeal region, the force is too large than the range of the tailbone to withstand the fracture of the tailbone will occur, this is a relatively common tailbone fracture of the mechanism of injury, the main manifestation of the injury is the sacrococcygeal pain, affecting the sitting and standing or lying down, but does not affect the walking. Without displacement of the coccyx, the fracture will not compress the rectum in front and cause bowel dysfunction. Therefore, without affecting function, coccyx fracture does not require surgical intervention, and it is sufficient to avoid sitting, standing or lying down and wait for the fracture to heal. But a fall does not necessarily occur fracture, the force in the tailbone can withstand the range of fracture will not occur, although the manifestation of tail pain, mainly caused by soft tissue injury, so whether the fracture occurs, need to take X-ray to further clarify, can not be determined purely from the symptom to determine.