Lumbar Facet Syndrome
Arthritis or injury of the facet joints causing chronic axial low back pain
Lumbar facet syndrome refers to pain originating from the small synovial joints (facet joints or zygapophyseal joints) that connect adjacent vertebrae in the lower back. Each spinal level has two facet joints — one on each side — that provide stability and guide motion. When these joints become arthritic, inflamed, or injured, they can generate significant axial low back pain. Unlike disc herniations, facet syndrome typically does not cause radiation down the leg; pain stays in the low back, buttocks, and upper thighs. It is one of the most common identifiable sources of chronic low back pain in adults over 40.
Symptoms
- Dull, aching pain localized to the lower back — often worse on one or both sides
- Stiffness after prolonged sitting or upon waking that loosens with movement
- Pain that worsens with standing, walking, or spinal extension (bending backward)
- Tenderness directly over the facet joints (lateral to the midline)
- Pain that may radiate into the buttocks or upper thighs but not below the knee
- No true radiculopathy (facet pain does not cause foot numbness or tingling)
Causes & Risk Factors
- Age-related facet joint osteoarthritis (most common)
- Repetitive hyperextension activities (golf, tennis, gymnastics, heavy labor)
- Prior spine surgery altering load distribution
- Obesity and excess mechanical load on the posterior spine
- Inflammatory arthropathies such as ankylosing spondylitis
- Acute trauma or whiplash injury
Treatment Options
Conservative (Non-Surgical)
- Physical therapy focused on core strengthening and posture correction
- NSAIDs and oral anti-inflammatory medications
- Medial branch nerve block injections for diagnosis and short-term relief
- Facet joint (intra-articular) corticosteroid injections
- Activity modification and ergonomic adjustments
- Weight loss to reduce posterior spinal load
Surgical Options
- Radiofrequency ablation (neurotomy) of the medial branch nerves — the preferred intervention when two diagnostic blocks confirm facet origin (70–80% of patients achieve 6–18 months of relief)
- Fusion surgery is rarely indicated and typically reserved for refractory cases with instability
When to see a spine specialist
See a spine specialist if your low back pain has persisted beyond 6 weeks despite conservative care, worsens with standing or extension, or has not been adequately evaluated with imaging. If diagnostic injections are being considered, a pain management physician or interventional spine specialist is the appropriate referral.
Frequently Asked Questions
How is lumbar facet syndrome diagnosed?
There is no single definitive test. Diagnosis is based on the pattern of pain (axial, worse with extension, no radiation below knee), physical examination findings (tenderness over the facet joints), and imaging (X-ray or MRI showing facet joint arthrosis). The gold standard for diagnosis is a positive response to diagnostic medial branch block injections, which temporarily numb the nerves supplying the facet joints.
What is the difference between facet pain and disc pain?
Disc pain often radiates down the leg (sciatica) due to nerve root compression and worsens with sitting or flexion. Facet pain stays in the low back and buttocks, worsens with extension (standing, walking, bending back), and is relieved by sitting or leaning forward. Both can coexist. An MRI can identify structural changes but imaging alone cannot confirm facet syndrome as the pain source — diagnostic blocks are needed.
Does radiofrequency ablation work for facet syndrome?
Yes — RFA is the most effective durable treatment when diagnostic blocks confirm facet origin. Approximately 70–80% of properly selected patients report significant relief lasting 6–18 months. The procedure can be repeated when the medial branch nerve regenerates. Success depends critically on correct diagnosis via two positive diagnostic blocks prior to treatment.
Is lumbar facet syndrome the same as facet joint arthritis?
Facet joint osteoarthritis is the structural finding (joint degeneration visible on imaging); lumbar facet syndrome is the clinical diagnosis (pain attributed to those joints). You can have facet arthrosis on imaging without pain, and you can have facet syndrome with only mild imaging changes. The clinical picture — symptoms, exam, and response to diagnostic blocks — determines the diagnosis.
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Medical disclaimer: This content is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider for diagnosis and treatment decisions. Last reviewed April 2026. ICD-10: M47.816.