Buttock groove pain in the uppermost part of the pressure, i.e., tailbone pain, may be caused by soft tissue injury, fracture, sciatic nerve pain and other reasons. 1. Soft tissue injury: collision, extrusion, cutting, tearing, falling, firearm injury and other injury factors may cause soft tissue injury. When soft tissue injury occurs in the tailbone, pain may appear when pressing, and there may also be skin breakage, local swelling and other symptoms. 2. Fracture: mostly caused by direct violence, indirect violence, muscle strain, muscle strain, etc. When there is a fracture of the tailbone, there may also be pain when pressing. 3. Sciatic nerve pain: it may be caused by lumbar disc herniation, sciatic neuritis, trauma, etc. Due to the compression of the sciatic nerve by the lesion site, pain may also appear when pressing. It is recommended to go to the hospital in time for the symptoms of tailbone pressure and pain, and follow the doctor’s instructions for treatment, so as to avoid delaying the condition.