What is Sacroiliac Dysfunction?
Dysfunction in the sacroiliac joint causes pain in the low back and/or leg. This condition is more common in young and middle age women. The sacroiliac joint lies next to the spine and connects the sacrum (the triangular bone at the bottom of the spine) with the pelvis (iliac crest). While it is not clear how the pain is caused, it is thought that an alteration in the normal joint motion may be the culprit that causes sacroiliac joint pain.

Symptoms

• Pain at a specific point towards the bottom of the spine at the top, middle of the buttocks. 
• Aching and stiffness in the lower back. 
• Pain radiates into the hip or groin.
• If you lie on your back and someone pushes down on both sides of your pelvis you might get pain in the joint.