SI Joint Pain

Background/Overview

Pain has a way of sneaking into our lives, changing the way we move, sit, sleep, and even think. One often overlooked source of stubborn lower back and hip pain is the sacroiliac (SI) joint — the small but mighty joint connecting your spine to your pelvis.

These joints quietly support your body every day, bearing the weight of your torso and helping you balance, walk, and shift positions. Most of the time, they work in harmony with the rest of your musculoskeletal system. But when something goes wrong — from inflammation to instability — the SI joint can become a significant and debilitating source of pain.

Many people live with SI joint dysfunction for months, even years, without realizing what’s causing their symptoms. Because SI joint pain often mimics other conditions like herniated discs, sciatica, or hip arthritis, it’s not uncommon for people to be misdiagnosed or feel dismissed.

Understanding SI joint pain is not just about diagnosing a problem — it’s about reclaiming comfort, confidence, and control over your body. Pain is not just a physical burden — it affects every corner of life, from your relationships to your mood to your dreams for the future. The good news? SI joint dysfunction is highly treatable, especially with the right information and care.

Treatment Options

Symptoms and Causes

What Does SI Joint Pain Feel Like?

SI joint pain can be tricky because it doesn’t always behave in predictable ways. Some people experience a sharp, stabbing pain; others describe it as a deep, nagging ache that never fully goes away.

Common symptoms include:

• Pain in the lower back, typically off to one side, just below the waistline
• Pain in the buttocks, hips, or groin
• Radiating pain down the thighs (but usually not past the knee)
• Stiffness or limited motion in the lower back, hips, or pelvis
• Worsening pain when standing from a seated position, climbing stairs, running, or sitting for prolonged periods
• Instability or a feeling of giving way in the pelvis or legs
• Tenderness when pressing over the SI joint area

Conditions We Treat

Pain tends to worsen with activities that put stress on the SI joint — like walking uphill, taking long car rides, or carrying heavy loads.

It’s important to note: SI joint pain can sometimes be misdiagnosed as a lumbar disc herniation, spinal stenosis, or even hip problems, because the symptoms can overlap.

Meet Our Pain Specialists

What Causes SI Joint Pain?

The sacroiliac joints are tough but not invincible. When they’re strained, injured, or inflamed, problems arise. Common causes include:

• Trauma: A fall, car accident, or direct blow to the pelvis can jolt the SI joints, leading to dysfunction or inflammation.
• Pregnancy and Childbirth: During pregnancy, hormones like relaxin loosen ligaments to prepare the pelvis for delivery. This added laxity, combined with the weight of the growing baby, can strain the SI joints.
• Repetitive Stress: Activities that involve frequent twisting, lifting, or running (especially on uneven surfaces) can wear down the SI joints over time.
• Arthritis:
  • Osteoarthritis can cause gradual degeneration of the joint cartilage.
  • Ankylosing spondylitis, an inflammatory arthritis, can fuse the SI joints over time, leading to significant pain and stiffness.
• Leg Length Discrepancy: Even a subtle difference in leg length can unevenly load the SI joints, causing chronic irritation.
• Previous Spinal Surgery: Procedures like lumbar fusion can alter the biomechanics of the lower spine, putting extra pressure on the SI joints.
• Infection: Though rare, infections of the SI joint (sacroiliitis) can cause intense pain and require urgent medical attention.

Sometimes, there’s no clear-cut cause — pain can build gradually due to poor posture, lifestyle habits, or a combination of small injuries over time.

Diagnosis and Tests

Getting the right diagnosis for SI joint pain is absolutely critical — because mistaking it for another spinal problem can lead to ineffective treatments and prolonged suffering.

Here’s what the diagnostic process typically involves:

• Detailed Medical History: Your doctor will ask about your symptoms, past injuries, pregnancies, surgeries, and daily activities. Every clue matters.
• Physical Examination: Specific tests — like the FABER test (Flexion, Abduction, and External Rotation), Gaenslen’s test, and compression tests — help isolate SI joint dysfunction.
• Imaging Studies:
  • X-rays can show joint degeneration or misalignment.
  • MRI provides detailed images of soft tissues, helping detect inflammation.
  • CT Scans may be used for a closer look at the bones.
• Diagnostic SI Joint Injection: The gold standard. A small amount of numbing medication is injected directly into the SI joint. If your pain significantly improves afterward, it confirms the SI joint as the pain generator.

Diagnosis is not always instant — it often takes careful evaluation, ruling out other potential causes, and a bit of detective work. But once pinpointed, treatment becomes much more targeted and effective.

Management and Treatment

Treatment for SI joint pain is highly personalized. For many people, non-surgical approaches provide profound relief. Here’s a closer look at options:

Conservative (Non-Surgical) Treatments

• Physical Therapy:
  A skilled physical therapist designs a program to strengthen the muscles around the pelvis and core, improve posture, and teach movement techniques that protect the SI joints.
• Medications:
  • Over-the-counter NSAIDs (like ibuprofen) reduce pain and inflammation.
  • Prescription medications, such as muscle relaxants or short-term opioids, may be used judiciously in severe cases.
• SI Belts:
  These supportive braces wrap around the pelvis to help stabilize loose joints and relieve pressure.
• Heat and Ice Therapy:
  Ice helps calm inflammation during acute flares; heat soothes tight muscles and improves blood flow.
• Lifestyle Modifications:
  Small changes, like avoiding uneven terrain, using proper lifting techniques, and balancing rest with gentle activity, can make a big difference.

Interventional Treatments

If conservative measures don’t fully resolve the pain, more targeted therapies may be considered:

• Corticosteroid Injections:
  These injections deliver powerful anti-inflammatory medication directly into the SI joint, offering significant, though sometimes temporary, relief.
• Radiofrequency Ablation (RFA):
  RFA targets the nerves transmitting pain signals from the SI joint, using heat to “turn them off” and providing longer-lasting relief — often 6-12 months or more.

Surgical Treatments

For severe, persistent cases where non-surgical treatments fail:

• SI Joint Fusion Surgery:
  A minimally invasive procedure fusing the SI joint using implants or bone grafts, eliminating painful movement. Recovery usually includes structured rehabilitation.

Surgery is typically considered a last resort, and fortunately, many people never need it.

Prevention

While not every case of SI joint dysfunction can be prevented, there are steps you can take to protect your body:

• Stay strong and flexible: Core strength and hip flexibility help stabilize the SI joints.
• Practice good posture: Whether standing, sitting, or lifting — body mechanics matter.
• Use proper lifting techniques: Bend at the knees, keep loads close to the body, and avoid twisting.
• Listen to your body: Early intervention is key. Don’t ignore persistent lower back, hip, or groin pain.
• Correct leg length discrepancies: Shoe inserts or orthotics can help balance your gait.
• Stay active: Regular, low-impact exercise like swimming, yoga, or walking supports joint health.

Prevention is about building resilience, not fear. Moving mindfully today can save you from pain tomorrow.

Outlook and Prognosis

With proper diagnosis and treatment, the majority of people with SI joint pain improve significantly. Many experience full resolution of their symptoms, especially when therapy is started early and treatment is consistent.

For those with chronic cases, new interventional procedures like RFA and minimally invasive fusion offer renewed hope — often restoring mobility, independence, and quality of life.

Living with SI joint pain can be exhausting, but it’s important to remember: you are not alone, and you are not stuck. Every step you take toward understanding and addressing your pain brings you closer to reclaiming the vibrant, active life you deserve.

Hope, healing, and help are always within reach.