Where is the sacroiliac joint?
The sacroiliac joint connects the last segment of the spine, the sacrum, to the pelvis. The integrity of the sacroiliac joint depends on strong ligaments that encase and cover the joint. These ligaments compress and stabilize the joint.
How the sacroiliac joint causes lower back pain?
The ligaments that encase the sacroiliac joint may be disrupted due to injury or degenerate due to age, allowing the joint to have excessive motion. This excessive motion may inflame and disrupt the joint and surrounding nerves.