SI Joint Injections

The SI joint is a short way of describing the sacroiliac joint - the large ear shaped joint between the sacrum bone and the pelvic bones.

Pain from the sacroiliac joint is usually felt in and around the upper buttock area but can spread at times round into the groin or down the leg. Inflammation in the SI joints can arise due to injury, due to problems with the alignment of the joints or as a result of a more widespread inflammation process in the body.

In young men a condition called Ankylosing Spondylitis can be a cause of sacroiliac or SI joint inflammation. This condition is known as sacroileitis.

SI joint injections are technically quite tricky to perform and my own preference is to do them under x-ray guidance .... using an x-ray machine to guide the needle to make sure that the injection is given properly into the joint. The sacroiliac joints lie quite deep inside our body so trying to do a "blind injection" (without x-ray guidance) means that there's quite a high chance of missing the actual joint.