Often hard to diagnose, sacroiliac joint dysfunction is commonly thought of as a source of lower back pain and/or leg pain. Connecting the triangular bone at the bottom of the spine (the sacrum) with the pelvis, the sacroiliac joint may be a source of pain if its normal motion is disturbed. More specifically, sacroiliac joint pain may be caused by too much or too little movement.

What causes sacroillitis? Both sacroiliitis and sacroiliac joint dysfunction are a common cause of sacroiliac pain, low back pain and leg pain. However, there are differences between the two conditions.

What causes SI joint pain? Sacroiliac joint dysfunction may arise with no cause or result from trauma. What does sacroilliac joint pain feel like? Common symptoms of sacroiliac joint dysfunction include lower back pain, stiffness, and instability.

Sacroiliitis is typically treated nonsurgically, such as with anti-inflammatory medications, rest, ice or heat, physical therapy and more. Surgery on the SI joint may be considered in severe cases.

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