While it is not clear how the pain is caused, it is thought that an alteration in the normal joint motion may be the culprit that causes sacroiliac pain.
Accurately diagnosing sacroiliac joint dysfunction can be difficult because the symptoms mimic other common conditions, including other mechanical back pain conditions like facet syndrome as well as other lumbar spine conditions including disc herniation and radiculopathy (pain along the sciatic nerve that radiates down the leg). A diagnosis is usually arrived at through physical examination.
Manual manipulation provided by a chiropractor, osteopath, or other qualified health practitioner may help. This can be highly effective when the SI joint is fixated or “stuck.” It may be irritating if the SI joint is hypermobile. This is accomplished by a number of methods including (but not limited to): side-posture manipulation, drop technique, blocking techniques, and instrument guided methods.