The sacroiliac joints reside among the sacrum (the tailbone section on the spinal column) and the outstanding wing-like iliac bones that sort the pelvic girdle. There are two SI joints, one to the remaining and 1 on the right (highlighted in crimson while in the graphic earlier mentioned), and together https://www.theorthopaedicandpainpractice.com/service/hip-groin-pain/