Sacroiliac Joint Dysfunction - SI Joint Pain Causes | SI-BONE

The Sacroiliac (SI) joint and Low Back Pain (LBP)

Pelvis and Sacroiliac Joint

As with other joints in the body, the sacroiliac (SI) joint can become damaged, can suffer from wear and tear, or the ligaments supporting the joint may be stretched or injured. This may result in altered function of the SI joint (SI joint dysfunction) which may result in pain in the buttocks, lower back, groin and even leg pain. SI joint dysfunction and associated pain can be caused by a specific traumatic event (disruption) or can develop over time (degeneration).

Trauma (common events that may cause SI joint disruption)

  • Motor vehicle accident
  • Fall on buttock
  • Lifting and/or twisting
  • Natural childbirth

Degeneration (common causes of SI joint degeneration)

  • Previous lumbar surgery (e.g., lumbar fusion of the L3/L4, L4/L5, or L5/S1)
  • Stresses to the SI joint due to leg length differences, joint replacement, or scoliosis
  • Pregnancy – chronic lower back pain during pregnancy and/or after giving birth (Post-partum Pelvic Girdle Pain, frequently described as PGP or PPGP)
  • Osteoarthritis
  • Previous iliac crest bone graft (ICBG)
  • Prior infection of the SI joint

Pain in the lower back and buttocks may be caused by the SI joint, hip, spine, or a combination of these structures. It is important that your doctor thoroughly evaluate ALL potential pain sources during a lower back pain exam. Carefully review the typical symptoms of SI joint pain.