Overview
Sacroiliac joint (SIJ) pain is responsible for 15–25% of all chronic low back pain. The
SIJ transfers load between the spine and the lower limbs, and is a complex synovial
joint stabilised by powerful ligaments. SIJ dysfunction causes pain in the buttock,
lower back, groin, and posterior thigh — often misdiagnosed as lumbar disc disease or
piriformis syndrome. At Vedant Pain Clinic, precise SIJ-targeted treatment offers
lasting relief when the diagnosis is confirmed.
Symptoms & Causes
Common Symptoms
- Pain in the buttock and lower back, usually unilateral
- Pain worsened by transitional movements — sit-to-stand, rolling in bed
- Positive FABER / FADIR / Gaenslen's tests
- Pain referral into groin, posterior thigh, or lateral hip
- Worsened by prolonged sitting on hard surfaces
- Post-pregnancy pelvic girdle pain
- Pain after spinal fusion surgery at L4-S1 (adjacent segment)
Common Causes
- Pregnancy and postpartum ligamentous laxity
- Inflammatory sacroiliitis (ankylosing spondylitis, psoriatic arthritis)
- Degenerative joint disease (osteoarthritis)
- Post-lumbar fusion — increased SIJ load (adjacent segment disease)
- Leg length discrepancy and altered gait
- Trauma — fall directly onto the buttock
- Hip or lumbar spine pathology altering pelvic mechanics
Conservative & First-Line Treatment
- Physiotherapy — SIJ stabilisation, core strengthening, gluteal activation
- Pelvic support belts for pregnancy-related SIJ pain
- NSAIDs and analgesics for acute pain
- Manipulation and manual therapy (osteopathy / chiropractic)
- DMARDs for inflammatory sacroiliitis
How Vedant Pain Management Clinic Can Help
Our interventional pain specialists offer the following evidence-based procedures, all
performed with real-time ultrasound guidance for precision and safety:
- Image-guided Sacroiliac Joint Injection (fluoroscopy / ultrasound) — diagnostic and
therapeutic
- Cooled Radiofrequency Ablation (Cooled RFA) of lateral branch nerves — offering
12–24 months of significant pain relief, the most durable non-surgical treatment for
SIJ pain
- Prolotherapy injections for SIJ ligamentous laxity (particularly effective in
postpartum cases)
- Differentiation from piriformis syndrome, lumbar facet pain, and hip joint pathology
through systematic diagnostic blocks
- PRP injection for SIJ ligamentous instability
Newer Diagnostic Concepts & Advances
Cooled Radiofrequency Ablation of the sacral lateral branches represents a major advance
over conventional RFA — the cooled probe creates a larger, more spherical ablation zone
ensuring coverage of the anatomically variable SIJ sensory nerves. Multiple randomised
controlled trials support Cooled RFA providing >50% pain reduction for 12–24 months
in confirmed SIJ pain.