What Is Facet Joint Syndrome? Symptoms, Differences and Manual Therapy

One of the most commonly missed sources of back pain is a set of small joints just behind the spine: the facet joints. While the pain is often put down to “muscle or disc”, these joints themselves can be the quiet lead of the story. There is another important side to facet-related pain: it is one of the pictures where hands-on treatment — manual therapy — genuinely has a place. In this article I look, from a physiotherapist’s point of view, at what the facet joints are, what kind of pain they cause, how this is told apart from other back pain, and how it is managed in physiotherapy — especially with manual therapy.

What are the facet joints, and what do they do?

Your spine is made up of vertebrae stacked one on top of another, and between each pair of vertebrae there is a disc at the front and two small joints at the back: the facet joints (also called the zygapophyseal joints in medicine). With one pair at each spinal level, they run down the back of the spine. These are real joints, just like the one in your knee or finger: they have cartilage surfaces, a thin fluid-lined membrane and a capsule wrapping around them.

Their job is to give your spine direction and limits: they allow movements such as bending and rotation while stopping one vertebra from sliding too far over another. The capsule of these joints is richly supplied with nerve endings; this makes them both sensitive structures that sense movement and sources that can produce marked pain when they are irritated. In other words, the facet joint is a structure that quietly guides your movement when healthy, and can genuinely hurt when something goes wrong.

What does facet joint pain feel like?

Facet-related pain has a character of its own, though not a definite one. Its most typical feature is that it worsens with leaning backwards (extension) and with rotating the trunk or leaning to the side. Standing for a long time, walking, or arching the back can flare the pain, while sitting, leaning forward and resting often bring relief.

The pain is usually felt on one or both sides of the back, right beside the spine, quite locally; it can sometimes refer towards the buttock or the back of the thigh. But here is an important distinction: facet-related pain typically does not travel below the knee and does not produce true nerve symptoms (marked numbness or weakness in the leg) — an important clue that separates it from a disc problem or sciatica. Stiffness in the mornings or after staying still for a long time, easing with movement, is also common. Sometimes the picture starts more suddenly: a person’s back “locks” with an awkward movement and they struggle to bend and straighten — part of what is commonly called a “locked back” can also have the facet joints behind it.

Is the pain really coming from the facet? The honest side of diagnosis

We should be honest here: there is no examination test or imaging method that confirms facet joint pain on its own. Seeing wear (arthrosis) in the facet joints on an MRI or CT does not prove your pain comes from there — because such changes are also present on the scans of many people with no complaints at all. The reverse is true too: a young person with a perfectly clean scan can very well have facet-related pain from irritation of the joint capsule. In short, the finding on the image and the pain that is felt are not always the same thing. (This is part of the wider picture we cover in the wear and tear of the spine article — facet wear is part of that degeneration picture, but is not on its own the cause of the pain.)

Scientifically, the most definite way to confirm facet pain is a diagnostic medical injection to the relevant nerve branch — and even this can give a high rate of misleading results. In practice, our path in physiotherapy is different: we work from a detailed history, an assessment of pain that changes with the direction of movement, a hands-on examination of the joints and — most importantly — the response you give to treatment. So the diagnosis is not a label placed by a single test, but a working hypothesis that forms within a clinical whole and is confirmed by treatment.

Telling it apart from disc, sciatica and other back pain

The value of the facet picture lies largely in being able to tell it apart from similar conditions:

• Disc problem / sciatica: here the pain often spreads down the leg, below the knee, with true nerve symptoms (numbness, weakness). Facet pain stays more local and does not travel below the knee.
• Spinal stenosis: in stenosis, leaning back also flares the pain, but the typical picture is a heaviness and numbness spreading into both legs that comes on with walking. Facet pain is more confined to the back and thigh and does not produce true nerve symptoms.
• Sacroiliac joint: the pain is felt at the junction of the low back and hip, lower down and to the side; the facet, on the other hand, comes from the joints at the back of the spine, a little higher up.
• Non-specific / mechanical back pain: the facet is in fact one of the specific possible sources within this broad “mechanical back pain” umbrella; this typical movement-dependent pattern makes it more recognisable within the umbrella.

These distinctions are not sharp lines and the pictures often overlap; this is exactly why a detailed assessment is valuable for clarifying the question of “which structure, and how much”.

The role of manual therapy in facet pain

Facet-related pain is one of the pictures where hands-on treatment — manual therapy — offers a genuine contribution. Two main approaches stand out here: joint mobilisation (loosening the joint in particular directions with controlled, gentle rhythmic movements) and, in suitable cases, high-velocity, low-amplitude joint manipulation (HVLA) — the fast, small-amplitude technique often associated with a “clicking” sound. (I have looked separately at what this technique is and how it differs from chiropractic in the manual therapy versus chiropractic article.)

What does the evidence say? Systematic reviews show that manual therapy (mobilisation and manipulation) reduces pain and improves movement and function in back pain; the effect of manipulation can be a little more marked than mobilisation, and both techniques are safe in skilled hands. But the honest framing is this: this effect is real yet modest, and largely short-to-mid-term; manual therapy on its own is not a lasting “repair”. Its real strength is that by reducing pain and stiffness and reopening movement, it gets you ready for active treatment — exercise. Especially in an acute back that feels “locked”, a well-timed mobilisation or manipulation can bring relief and speed the process along. So manual therapy is the key that opens the door; what sets the room in order is exercise and good movement habits.

Assessment and the whole treatment in physiotherapy

The most effective path in facet-related pain is not to lean on a single technique, but a whole-picture plan. In the assessment we look at which movements change the pain, which level it comes from, the mobility of the hip and pelvis, and the control of the trunk muscles. Treatment is then typically built on three legs: manual therapy in the painful phase (mobilisation/manipulation, plus soft-tissue work where needed) for relief and range of movement; individualised exercise to retrain the deep trunk muscles (especially the deep abdominal muscles and the spinal stabiliser multifidus), hip mobility and endurance; and education to understand the movements that flare and settle the pain. International guidelines also recommend this kind of combined, active approach as the first step in back pain. Our aim, beyond easing the pain, is to make your back more resilient to future loads.

Exercise and daily life

The general principle in facet-related pain is to avoid staying in the same — especially backward-arched — position for a long time, and to spread movement across the day. If you have to stand for a long time, it helps to bring one knee slightly forward now and then to shift the load, and to change position from time to time. Graded strengthening that targets the deep abdominal and back muscles, hip flexibility and an active life in general are the things that help most in the long run. But there is no single exercise prescription that suits everyone; which movement will be good for you is decided by the findings in the assessment. The honest point here is this: exercise does not “wear out” or damage the facet joints — on the contrary, the right load and movement support these joints and the muscles that wrap around them.

Recovery, recurrence and when to be assessed

Facet-related pain usually runs a good course: it settles markedly with the right approach. But to be honest — especially if there are age-related joint changes underneath, the pain can tend to recur from time to time. This does not mean “you will be in pain for life”; it is a picture that can be managed with the right exercise, movement habits and, when needed, manual therapy. The goal is to make the flares fewer and milder.

Most facet-related back pain is a mechanical and harmless picture. Even so, pain that does not settle despite changing position and wakes you from sleep at night; or symptoms such as marked weakness spreading into the leg, numbness over a wide area, or a change in bladder or bowel control, suggest something beyond simple facet-related pain and call for a health assessment without losing time. These are uncommon situations; the aim is not to alarm you, but for you to know when to take a step. To clarify the source of the pain in your back and build a plan of your own, a physiotherapy assessment is the soundest start.

References

• StatPearls — Lumbar Facet Arthropathy. NCBI Bookshelf, NIH.
• Cohen SP, Raja SN. Pathogenesis, diagnosis, and treatment of lumbar zygapophysial (facet) joint pain. Anesthesiology. 2007.
• Kalichman L, et al. Facet joint osteoarthritis and low back pain in the community-based population. Spine. 2008.
• Coulter ID, et al. Manipulation and mobilization for treating chronic low back pain: a systematic review and meta-analysis. The Spine Journal. 2018.
• Bronfort G, et al. Efficacy of spinal manipulation and mobilization for low back pain and neck pain: a systematic review and evidence synthesis. The Spine Journal. 2004.