Sacral injuries have symptoms such as pain, swelling, bruising, fear of sitting, and perineal sensory disturbances. 1. Pain: After sacral injury, there will be severe persistent pain in the affected area, which will be aggravated when pressed or touched. 2. Swelling: Sacral injuries are usually accompanied by local soft tissue injuries, due to inflammation and subcutaneous bleeding from soft tissue injuries, the affected area will swell. 3. Bruising: Subcutaneous bruising occurs after damage to subcutaneous blood vessels. 4. Fear of sitting: when sitting, the affected area is compressed and causes pain, so the patient appears to be afraid of sitting. 5. Perineal sensory disorder: if the sacral injury involves the sacral foramen, it will stimulate the sacral nerve and cause perineal pain, numbness, hypesthesia and other symptoms. When the sacrum is injured, if the above symptoms appear, you should go to the hospital in time for further diagnosis and treatment.