Sacroiliitis is inflammation of one or both of your sacroiliac (SI) joints. Because of its connection to degenerative changes in the spine, your doctor may refer to your condition as degenerative sacroiliitis. Sacroiliitis can cause painful sacroiliac joint dysfunction.
What Is Sacroiliitis?
Sacroiliitis affects your SI joints, which connect your sacrum in your lower spine to your pelvis. It is characterized by painful inflammation throughout your low back and buttocks, and may travel down through your lower extremities.
While degenerative changes can cause sacroiliitis, SI joint inflammation can also be caused by the following non-degenerative events:
Sacroiliitis produces pain in your lower extremities—from your low back to your buttocks, and sometimes down through one or both legs. Many people with sacroiliitis also report stiffness in their lower spine and hips.
People with sacroiliitis often experience pain that worsens during certain activities, including:
Because the symptoms of sacroiliitis are similar to other causes of low back pain, it can be challenging to diagnose.
To get to the bottom of your pain, your doctor starts with a review of your medical history and performs a physical and neurological exam. Doctors often detect SI joint dysfunction by having you lie on your back and moving your legs in different ways that places pressure on your SI joints. If you report pain during these sacroiliac joint maneuvers, it could be an indication that one or both SI joints are the source of your pain.
To help confirm that one or both of your SI joints is a pain generator, your doctor will administer a diagnostic sacroiliac joint injection. This type of injection delivers numbing medicine into the joint(s). If you experience relief after the injection, that’s a good sign the SI joint is a pain generator.
While physical exams and diagnostic injections may be enough to diagnose SI joint dysfunction, an imaging test may be needed to show if sacroiliitis is the true cause of the dysfunction. Damage caused by inflammation around the SI joints may show up in magnetic resonance imaging (MRI), computed tomography (CT), and plain x-ray scans to confirm the diagnosis.
Non-Surgical Treatment for Sacroiliitis
Sacroiliitis can be extremely painful, but most people find that non-surgical methods are effective at managing their symptoms.
Home treatments and physical therapy
A wide spectrum of medication may be recommended based on your symptoms and their characteristics (eg, acute, episodic).
Other non-surgical therapies
If conservative, at-home approaches aren’t providing relief, your doctor may recommend the following treatment:
Fusion Surgery for Sacroiliitis
If you have tried several non-surgical therapies with no success, it may be time to talk to your doctor about surgery for sacroiliitis. Surgery to treat sacroiliitis is rarely needed.
Surgery to fuse one or both SI joints is, which is called SI joint stabilization or SI joint fusion, prevents the joints from moving, and this may help relieve pain. Like several types of spine surgery, you may have the option to have the procedure performed traditionally (or open) or minimally invasively.
Tap into More Sacroiliac Joint Dysfunction Resources
Sacroiliitis and SI joint dysfunction can cause debilitating pain and loss of function. Fortunately, several treatments can help ease your pain. To learn more about your options, check out the Sacroiliac Joint Center. You can also visit the Patients' Guide to Sacroiliac Joint Problems to further explore the condition and read patient stories.