Tailbone is the tailbone. Tailbone pain may be caused by physiological factors such as soft tissue pressure, or it may be caused by pathological factors such as tailbone fracture, infectious diseases and tailbone tumor. 1. Physiological factors: if the patient keeps sitting for a long time, the soft tissues around the coccyx muscles are in the state of pressure for a long time, which can cause pain around the coccyx and other symptoms, change the sitting posture, and the appropriate activities can be gradually relieved. 2. Tailbone fracture: due to fall, fall from height and other traumatic factors, make the buttocks on the ground, can lead to tailbone fracture due to external force, causing pain in the tailbone, can also be accompanied by swelling of the surrounding soft tissues, bruises, etc.. 3. Infectious diseases: when pathogenic bacteria involve the tailbone, muscle, fascia and other tissues, it can cause inflammatory reaction of the tissues and symptoms such as pain, redness, swelling and fever at the same time. 4. Tailbone tumor: when there is a tumor occupying the tailbone, it can also cause pain in the tailbone area, and should be promptly consulted for examination. There are many reasons that cause pain in tailbone, it is recommended to improve the tailbone CT, nuclear magnetic examination, etc., and carry out corresponding treatment after clear diagnosis.