What is an SI Joint Injection?
The sacroiliac joint is a large joint in your lower back and buttocks region. When the joint becomes painful, it can cause pain in its immediate region or it can refer pain into your groin, abdomen, hip, buttock or leg.
In a sacroiliac joint injection, a local anesthetic and a corticosteroid are injected into one or both of your sacroiliac joints, or into the ligaments surrounding the joints. The local anesthetic, a numbing medicine, lessens the pain temporarily. The corticosteroid reduces inflammation that may be causing pain. The injection can be used for both diagnosis and treatment. If the injection immediately lessens your pain and helps you move better, it tells our doctors that the sacroiliac joint is the cause of the pain.