Tailbone is located at the very end of the spine, lying down to sleep tailbone pain, may belong to the normal situation, may also be due to chronic strain or tailbone disease, etc. caused. Patients should let the doctor according to the relevant symptoms and examination results, comprehensive judgment. 1, normal situation: if sleeping bed is too hard, some thin patients tailbone part of the bone protrudes more obvious, easy to be compressed during sleep, which causes tailbone ligament, fascia ischemia, ischemic pain; 2, chronic strain injury: due to sedentary, trauma and other reasons, the patient’s tailbone part of the long-time pressure, friction, resulting in local ligaments, fascia, ischemic pain; 2, chronic strain: because of the sitting, trauma and other reasons, the patient tailbone part of the long-time Chronic strain injury: due to sedentary, trauma and other reasons, the patient’s tailbone area is subjected to prolonged compression and friction, resulting in chronic injury of local ligaments and fascia. When sleeping at night, due to the compression and stimulation of the bed, the patient’s symptoms flare up, pain, discomfort and other symptoms; 3, tailbone disease: such as fracture, dislocation, ligament injuries, tumors, etc., which can cause pain, swelling phenomenon, or fracture dislocation is not well reset, the tailbone part of the deformity of the healing process, leaving chronic ischemic pain, and pain flare up at bedtime due to friction, cold and other reasons. When lying down to sleep, if the tailbone pain, patients should pay attention to the occurrence of any disease, you can go to the hospital for local X-ray film, magnetic resonance and other related examinations, and then targeted treatment.