What Is Spinal Osteoarthritis?

Spinal osteoarthritis is the progressive breakdown of cartilage lining the facet joints — small paired joints that connect adjacent vertebrae at the back of the spine. As cartilage wears away, bone-on-bone friction produces pain, stiffness, inflammation, and bone spur formation. It is the most common form of spinal arthritis and a leading cause of axial low back pain in adults over 50.

How Are the Facet Joints Different From Spinal Discs?

The facet joints and the intervertebral discs work together to allow controlled spinal movement, but they are anatomically distinct structures. Understanding that difference matters for diagnosis and treatment planning.

The facet joints are small synovial joints located at the posterior (back) of each vertebral segment. Each spinal level has two — one on each side — and their primary job is to guide and limit spinal movement while bearing a portion of spinal load. They are lined with articular cartilage and enclosed by a synovial capsule, much like the joints of a knee or hip.

The intervertebral discs sit between the vertebral bodies at the front of the spine. They are fibrocartilaginous structures — not synovial joints — and their failure mode is different: disc breakdown typically involves annular tears, nucleus herniation, or fluid loss rather than cartilage erosion. Both the discs and the facet joints can degenerate simultaneously, and chronic low back pain often involves contributions from both structures. A thorough clinical evaluation is the only way to determine which structure is the primary pain generator.

What Causes Spinal Osteoarthritis to Develop?

Facet joint degeneration follows a predictable biological sequence rooted in age, mechanical load, and genetics.

Early changes begin with softening and surface fibrillation of articular cartilage — often starting in the third or fourth decade of life. As cartilage matrix proteins degrade and cartilage-producing cells (chondrocytes) lose function, full-thickness cartilage loss eventually exposes the underlying bone. The subchondral bone responds by thickening and forming osteophytes (bone spurs) at joint margins. The synovial lining becomes inflamed, producing excess fluid and further joint capsule distension.

Contributing factors include:

• Age — The single strongest predictor. Radiographic facet changes are detectable in many adults by their 40s and become nearly universal by the seventh decade.
• Mechanical load — Occupations or activities involving repetitive spinal extension, rotation, or heavy lifting accelerate cartilage wear.
• Prior disc degeneration — As discs lose height, the facet joints bear a greater share of spinal load, accelerating their breakdown. This is why facet arthropathy and disc-related causes of chronic back pain frequently coexist.
• Obesity — Excess body weight increases compressive forces across all spinal joints.
• Genetics — Familial patterns of osteoarthritis suggest a heritable component to cartilage integrity.
• Prior spine injury — Trauma altering spinal alignment or joint mechanics can predispose affected segments to accelerated degeneration.

What Does Spinal Osteoarthritis Feel Like?

The hallmark symptom is axial spinal pain — pain localized to the low back or neck rather than radiating into a limb — that worsens with extension and rotation movements. Morning stiffness that eases with gentle movement is characteristic.

Common symptom patterns include:

• Deep aching pain in the lower back, often worse after prolonged standing or walking
• Stiffness that is most noticeable after rest or on waking
• Referred pain into the buttocks, hips, or posterior thighs (from lumbar facet joints) — often described as a dull, diffuse ache rather than a sharp, dermatomal radiculopathy
• Referred pain into the shoulders or upper arms (from cervical facet joints)
• Audible or palpable grinding with spinal movement in more advanced cases
• Radicular symptoms (shooting pain, numbness, tingling into an arm or leg) when osteophytes or thickened joint capsule encroach on exiting nerve roots or narrow the spinal canal

Pain patterns from facet arthropathy can closely mimic disc-related pain and sacroiliac joint dysfunction. A structured clinical evaluation — often including imaging and targeted diagnostic injections — is required to distinguish them. For context on overlapping pain generators, see our guides on sacroiliac joint dysfunction and lumbar facet syndrome.

Is Spinal Osteoarthritis the Same as Spondylosis?

The terms are related but not identical. Spondylosis is a broad label for age-related spinal degeneration that encompasses disc narrowing, osteophyte formation, and facet joint arthritis. Spinal osteoarthritis specifically refers to cartilage loss in the facet joints. A diagnosis of spondylosis almost always implies some degree of facet arthropathy — but the term itself does not pinpoint which structure is generating the patient’s symptoms.

For a grounding in the spinal anatomy relevant to both conditions, see our overview of lumbar spine anatomy.

How Is Spinal Osteoarthritis Diagnosed?

Diagnosis combines clinical history, physical examination, and imaging. No single test is definitive on its own.

• History and physical exam — Pain location, movement patterns, and response to extension vs. flexion provide initial diagnostic direction.
• Plain X-ray — Reveals joint space narrowing, osteophyte formation, and subchondral sclerosis. Useful for staging severity.
• MRI — Provides superior soft-tissue detail, including synovial fluid, joint capsule thickening, and concurrent disc pathology. MRI is the preferred modality when neural compression is suspected.
• CT scan — Offers detailed bony architecture; useful for surgical planning when indicated.
• Diagnostic facet joint injection (medial branch block) — A targeted injection of local anesthetic at the medial branch nerves supplying the facet joint. Significant pain relief following injection confirms the facet joint as the primary pain source. This is often a prerequisite for radiofrequency ablation.

What Are the Non-Surgical Treatment Options?

The large majority of spinal osteoarthritis cases are managed without surgery. A stepwise approach typically begins with the least invasive options and progresses based on response.

• Physical therapy — Core stabilization and postural correction reduce load on the facet joints and can meaningfully reduce symptom frequency.
• Anti-inflammatory medications — NSAIDs reduce synovial inflammation. Use is guided by the patient’s overall medical profile and tolerability.
• Facet joint injections — Corticosteroid injections into the affected joint provide temporary inflammation control. Duration of relief varies by patient.
• Medial branch blocks and radiofrequency ablation (RFA) — RFA uses heat to interrupt pain signals from the medial branch nerves supplying the facet joints. For confirmed facet-mediated pain, RFA can provide relief lasting 6–18 months or more in responsive patients.
• Activity modification — Avoiding prolonged extension postures, adjusting workstation ergonomics, and modifying high-impact activities can reduce symptom load.
• Weight management — Reducing excess body weight lowers compressive forces across all spinal segments.

Surgery — typically spinal fusion — is reserved for cases involving severe neurological compromise that does not respond to conservative care. For patients who also have disc pathology contributing to their pain, separate evaluation for disc-specific treatment options is appropriate.

When Does Disc Pathology Overlap With Facet Arthropathy?

Spinal osteoarthritis and disc degeneration frequently coexist — and for patients dealing with both, the treatment picture is more complex. Disc height loss shifts mechanical load to the facet joints, accelerating arthritis. Conversely, facet instability can alter disc mechanics over time.

For patients whose pain is driven primarily by disc pathology — including annular tears — rather than facet degeneration, the treatment pathway differs from facet-directed therapies. Disc-specific evaluation may identify whether an intra-annular fibrin injection or other biologic disc repair approach is appropriate for the disc component of their pain. A clinical evaluation is the only way to know for certain which structure is the dominant pain generator and which treatment path fits the individual’s findings.

For further reading on related structural conditions, see our articles on lumbar instability, spondylolisthesis, and ligamentum flavum hypertrophy — all of which can coexist with facet arthropathy and contribute to the overall spinal pain picture.

Frequently Asked Questions

What is the difference between spinal osteoarthritis and degenerative disc disease?

Spinal osteoarthritis affects the facet joints — the bony posterior joints connecting vertebrae — while degenerative disc disease involves breakdown of the intervertebral discs between vertebral bodies. Both conditions often occur together and contribute to axial low back pain, but they are distinct structural problems requiring targeted evaluation to determine which is the primary pain source.

Can spinal osteoarthritis be treated without surgery?

The large majority of cases are managed non-surgically. Options include physical therapy, anti-inflammatory medications, facet joint injections, and radiofrequency ablation. Surgery is reserved for cases with severe neurological compromise that does not respond to conservative care.

What does spinal osteoarthritis feel like?

The hallmark symptom is axial low back or neck pain that worsens with extension and rotation. Morning stiffness, pain that eases with gentle movement, and referred pain into the buttocks or shoulders are common. When bone spurs narrow the spinal canal or compress nerve roots, radicular symptoms — shooting pain, numbness, or tingling into a limb — can also develop.

Is spinal osteoarthritis the same as spondylosis?

The terms overlap significantly. Spondylosis describes age-related spinal degeneration broadly — including disc narrowing, osteophyte formation, and facet arthritis. Spinal osteoarthritis refers specifically to cartilage loss in the facet joints. A spondylosis diagnosis typically implies some degree of facet arthropathy, but a targeted evaluation is needed to identify the primary pain generator.

At what age does spinal osteoarthritis typically begin?

Radiographic evidence of facet joint degeneration can appear as early as the 30s and 40s. Symptoms are most prevalent in adults over 50. By the seventh decade, some degree of facet arthropathy is present in the majority of the population — though severity and symptom burden vary widely.

Can facet arthropathy cause leg pain?

Facet joints themselves refer pain into the buttocks and posterior thighs — a dull, diffuse pattern rather than the sharp dermatomal radiculopathy typical of disc herniation. However, when osteophytes or joint capsule enlargement compress exiting nerve roots or narrow the spinal canal, true radicular leg symptoms can develop. Imaging and diagnostic injections help distinguish these patterns.

This content is for general informational purposes only and does not constitute medical advice, diagnosis, or treatment. It is not a substitute for evaluation by a qualified physician. Treatment decisions depend on your individual medical history and clinical findings. Schedule a consultation to discuss whether the procedure is right for you.