The sacroiliac joints reside involving the sacrum (the tailbone segment with the spinal column) and also the prominent wing-like iliac bones that sort the pelvic girdle. There are 2 SI joints, one particular about the remaining and 1 on the appropriate (highlighted in purple inside the image above), and combined https://www.theorthopaedicandpainpractice.com/service/hip-groin-pain/