The causes of tailbone pain may be strain injury, joint degeneration, lumbar spine disease and fracture and dislocation. 1. Strain: When the lumbosacral muscles are overloaded and remain in a state of strong contraction for a long time, the pressure within the muscles increases, blood supply is insufficient, ischemia and hypoxia, and long-term chronic strain will cause pain in the coccyx. 2. Joint degeneration: when the body is in a bad position or the muscles are in an unbalanced condition, it is easy to cause or accelerate the strain of sacroiliac joints, which will cause the degeneration of the sacrococcygeal joints and lead to pain in the tailbone. 3. Lumbar spine diseases: Lumbar spine diseases such as lumbar disc herniation may cause tailbone pain. 4. Fracture and dislocation: Fracture and dislocation of the tailbone can occur when the cartilage at the tailbone is traumatized and violent, which can cause tailbone pain. Tailbone pain may also be caused by other reasons, should go to the hospital in time to identify the cause and carry out targeted treatment.