Sacro-iliac Syndrome

What is it?

Pain at the bottom of the back where the pelvis and spine meet.

What are the causes?

  • A fall or lifting injury involving a torsional stress to the sacroiliac joint.
  • Stepping off a curb or twisting in bed have been implicated in sacro-iliac joint locking.

What are the symptoms?

  • Pain in region of where the pelvis and spine meet (Sacrio-iliac joint), with referred pain into posterior thigh, iliac fossa, and buttock. 
  • Occasionally it may extend down the lateral or posterior calf to ankle, foot and toes. 
  • Local tenderness over the posterior sacroiliac ligaments and sacrotuberous ligaments
  • Unilateral muscle tension in the back muscles (erector spinae) of same side.
It must be noted that acuteness of pain in a sacroiliac joint is not always indicative of the site or causation.  A locked sacroiliac joint may result in increased motion demands on the opposite side, in turn causing pain and inflammation of that joint.  The most acute tenderness is frequently found in the sacroiliac joint opposite to the one that is jammed or locked.

Lower Back Pain