Tailbone pain may be caused by lumbar disc herniation, lumbosacral tumor or perianal abscess. 1. Herniated lumbar intervertebral disc: after herniation of lumbar intervertebral disc, it may produce persistent pressure on tailbone, which may cause tailbone pain. 2. Lumbosacral tumor: when tumor tissue is formed in lumbosacral area, the local tumor tissue may infiltrate and grow to the surrounding area, and sometimes the volume of the tumor tissue will be larger, which will also cause tailbone pain. 3. Perianal abscess: when there is abscess in the soft tissues around anus, the local tissues may have inflammatory changes such as congestion and swelling, and the abscess will extrude the tailbone in the process of increasing, which will lead to coccygeal pain. The symptoms of coccygeal pain may be due to a variety of diseases, and the cause can be clarified through lumbosacral MRI and other imaging tests, and it is best to receive timely and regular treatment in order to have a better prognosis.