The sacroiliac joints reside among the sacrum (the tailbone segment of the spinal column) as well as prominent wing-like iliac bones that variety the pelvic girdle. There are 2 SI joints, 1 over the still left and just one on the correct (highlighted in red from the graphic above), and https://www.theorthopaedicandpainpractice.com/service/hip-groin-pain/