Tailbone pain may be caused by congenital deformity of tailbone development, trauma to tailbone, lumbar disc herniation and other reasons. 1. Developmental deformity of tailbone: when the tailbone develops deformity, it may cause frequent friction with the surface of the stool when sitting or standing, which is easy to cause aseptic inflammation, and the stimulation of inflammation may lead to the symptom of soreness of tailbone. 2. Trauma to the tailbone: localized injuries caused by the impact and extrusion of the tailbone may lead to the symptoms of tailbone pain. 3. Lumbar disc herniation: When lumbar disc herniation occurs, it can cause compression and stimulation to the sacrococcygeal nerves, which can cause tailbone pain. Tailbone pain, need to go to the regular hospital in a timely manner for relevant examinations, to clarify the specific causes, and then actively carry out targeted treatment.