There are three main reasons for the pain in the bone above the anus: 1, due to trauma in the tailbone area, such as accidentally falling on the ground, resulting in tailbone fracture, bone fracture, the formation of local inflammatory edema and bruising and swelling, stimulation of the surrounding tissues, and the appearance of the pain in this area. 2, due to the fasciitis of the tailbone, such as a history of trauma, not fully recovered from the excessive exercise, which will result in the formation of a chronic foci, the formation of chronic fasciitis. Chronic foci, the formation of chronic fasciitis, so in the cold and sit for too long, it is easy to appear in this part of the pain. 3, due to the end of the tailbone has a bursa, if the sitting time is too long, or this part of the stimulation of trauma and cold, it is easy to form bursitis, in the sitting position and activities, there is a clear pain.