Sacroiliac joint (SI joint) pain arises from degenerative changes within the SI joint. These changes may cause inflammation. The mainstay of treatment is anti-inflammatory medication, physical therapy, chiropractic care and activity modification. If these treatments fail to provide adequate pain relief, injections may be considered.
SI joint injections may also be used as a diagnostic evaluation. If the pain decreases significantly after the injection, this helps to verify the joint as a source of pain. Injections may provide temporary pain relief or the pain may remain reduced for a long period of time.
The sacroiliac joint is the joint located between the sacrum (which supports the spine) and the ilium bones (which support the sacrum) of the pelvis.
Being the link between the ilium bones and the sacrum, this joint is responsible for tranferring the weight of the upper body to the lower extremities. Not hard to see why there may be some pain experienced there from time to time.
Once you have decided to have the injection, the following events take place: