The common causes of tailbone pain are as follows: 1. congenital malformation of the tailbone, due to the developmental malformation of the tailbone, resulting in abnormal function, resulting in pain; 2. seen in trauma to the tailbone, due to the trauma of falling and sitting often leads to tailbone injury or even tailbone fracture, which can cause pain; 3. due to prolonged sitting on a relatively hard bench, resulting in chronic strain injury to the tailbone, often accompanied by bursitis 4, seen in lumbar disc herniation, some central type of herniation will lead to pain in the tailbone reflex region; 5, common in pregnant women, due to the pelvic pressure of pregnant women is relatively large, squeezing the tailbone and then a long sitting position, which aggravates the damage to the tailbone, resulting in pain; 6, sacral, tailbone tumor, due to tumor invasion of the bone will cause serious pain; 7, rare patients Perianal abscess may also occur, involving pain in the tailbone, and this situation also needs attention.