What is a SI joint injury?
A person with a SI joint injury has damaged the sacroiliac joint, which unites the sacrum to the pelvis. Common causes of SI joint injury include falls, contact sports, and automobile accidents. SI joint injury may occur with a sacrum fracture or a pelvic fracture.

What are the symptoms of a SI joint injury?
The most common symptom of SI joint injury includes low back pain, located in the sacrum or pelvis. Additional symptoms of a SI joint injury include swelling or tenderness over the sacrum.

How does the doctor treat a SI joint injury?
Treatment for a SI joint injury may include rest, cold compresses, physical therapy, and nonsteroidal anti-inflammatory medications for pain. Additional treatment may include injections of corticosteroid medications into the SI joint.