Sacroiliac joint dysfunction generally refers to pain in the sacroiliac joint region that is caused by abnormal motion, either too much motion or too little motion, in the sacroiliac joint. It typically results in inflammation of the sacroiliac joint and can be debilitating. Leg pain from sacroiliac joint dysfunction can be particularly difficult to differentiate from radiating leg pain caused by a lumbar disc herniation (sciatica) as they can feel quite similar.
The sacroiliac joint connects the hip bones (iliac crests) to the sacrum, the triangular bone between the lumbar spine and the tailbone (coccyx). The primary function of the sacroiliac joints is to absorb shock between the upper body and the pelvis and legs.
The primary causes of Sacroiliac joint dysfunction include:
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