Soreness above the tailbone may be caused by physiological factors such as sedentary activities and exertion, or it may be caused by pathological factors such as trauma, lumbar spine disease, sacroiliac arthritis and bone tumor. 1. Physiological factors: such as sedentary, heavy physical labor and other factors, can lead to lumbosacral muscle strain, soreness above the coccyx, which is a normal physiological phenomenon, appropriate rest, change the sitting posture can gradually relieve the symptoms. 2. Trauma: If the patient suffers from external impact or falls, it can lead to soft tissue injury in the lumbosacral region, or even lumbar compression fracture or coccyx fracture, which will cause pain above the coccyx. 3. Lumbar spine disease: If the patient suffers from lumbar spine disease, such as lumbar intervertebral disc herniation or spinal stenosis, it can cause nerve root compression symptoms, which will also lead to pain above the tailbone, accompanied by pain and numbness on one side of the lower limbs. 4. Sacroiliac arthritis: due to ageing, chronic strain, heredity, infection and other factors, it can lead to aseptic inflammation of sacroiliac joints, resulting in lower back pain, accompanied by morning stiffness and impaired joint movement. 5. Bone tumor: in a few cases, pain above the tailbone is a sign of bone tumor, such as chondrosarcoma. Soreness over the tailbone may be caused by other factors, and it is recommended that patients go to the hospital in time for a detailed examination and targeted treatment after a clear diagnosis.