SI joint pain: : Pain in the sacroiliac joint in the pelvis when the pelvis is moved. See sacroiliac joint dysfunction. Many back pain conditions are associated with sacroiliac joint pain that is difficult to differentiate.

SI joint pain: : Pain in the sacroiliac joint in the pelvis when the pelvis is moved. See sacroiliac joint dysfunction. Many back pain conditions are associated with sacroiliac joint pain that is difficult to differentiate.
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