what is sacroiliitis
Sacroiliitis is a condition in which there is inflammation of one or both of the sacroiliac, or SI, joints. The two SI joints are where the upper and lower body meet.Specifically, the SI joints are where the lower portion of the spine connects to the pelvis.acroiliitis may be caused by trauma or injury, like car accidents or falls that result in damage to the sacroiliac joint. Pregnancy can also cause sacroiliitis, as the sacroiliac joints stretch and loosen in preparation for childbirth.