Red Light Therapy for Ringbone in Horses: Why the Type Decides Everything
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You feel it before you see it — a firm enlargement low on your horse's leg, near the pastern. Then the name arrives, and it sounds like a verdict: ringbone. Progressive. Arthritic. The word carries a weight that makes owners assume the worst.
Here's what almost nobody explains, and it changes everything about what you should do next: ringbone isn't one condition. Depending on exactly where it is and what it involves, the correct response ranges from "monitor it and carry on" all the way to "this joint is being destroyed." Same word. Opposite situations.
So before we talk about whether red light therapy has any role — and we'll be honest that its role is small — we have to talk about the distinctions that decide your horse's future. Because with ringbone, more than almost any other condition, the type is the diagnosis.
The Short Answer
Red light therapy cannot treat ringbone. Ringbone is new bone growth and progressive arthritic change in a joint — a structural, bony problem. No light device rebuilds cartilage or changes bone architecture. And ringbone is incurable and progressive: once lameness and visible bony enlargement have developed, it's usually too late to reverse.
But the more important point isn't about red light at all. It's this: with some forms of ringbone, the right answer is no treatment. With others, it's urgent management. You cannot tell which from the outside — and reaching for any therapy, light included, before your vet has established the type is putting the cart a very long way before the horse.
What Ringbone Actually Is
Ringbone is progressive arthritic change affecting the pastern or coffin joint, with new bone forming around the joint — which is where the name comes from. It's driven initially by joint inflammation and an immune response, and predisposing factors include conformation (upright pasterns, or valgus/varus deviations that collapse one side of the joint), excessive weight, and use.
But "ringbone" alone tells you almost nothing useful. Two separate distinctions do the real work — and the second matters more than the first.
Distinction 1: High vs Low — Where It Is
| High ringbone | Low ringbone | |
|---|---|---|
| Joint affected | Pastern joint (between the two pastern bones, above the hoof) | Coffin joint (where the lower pastern bone meets the coffin bone, inside the hoof) |
| Visibility | Easier to see and feel — a firm enlargement above the coronet | Hidden inside the hoof capsule; harder to detect early |
| Role in movement | Pastern joint contributes relatively little to gait | Coffin joint is important in shock absorption |
| General outlook | Better — and surgical fusion is a viable option | More guarded — fusion is harder and less commonly pursued |
That difference in the joints' jobs is why the outlook differs. The pastern joint doesn't move much, so a horse can often cope — or even be fused — and carry on. The coffin joint absorbs shock deep inside the hoof, so damage there is harder to work around and harder to reach surgically.
Distinction 2: Articular vs Periarticular — the One That Decides Everything
The same word can mean "do nothing" or "the joint is being destroyed"
Periarticular (non-articular) ringbone forms new bone around the joint, without significantly involving the joint surface. And here's the part owners are almost never told: as long as the horse stays sound and the surrounding structures are undamaged, this form may need no treatment at all.
Articular ringbone involves the joint surface itself — the new bone affects where the bones actually meet and move. It is degenerative, more painful, and carries a more guarded prognosis. When it involves the coffin joint in particular, it can permanently lame the horse.
So the same diagnosis — "ringbone" — can describe a finding that needs nothing more than monitoring, or a joint-destroying disease that ends a career. The word doesn't tell you which. Only your vet can.
Why this makes "just try red light" the wrong instinct
If your horse has quiet periarticular ringbone that needs no treatment, applying a device is treating a problem that isn't asking to be treated. If your horse has articular coffin-joint ringbone, a device is a distraction from urgent veterinary management. In neither case is reaching for a therapy first the right move. The diagnosis isn't a formality you do on the way to treatment — with ringbone, the diagnosis is the decision.
The Cruel Paradox: the Bone That Hurts Can Also Heal
Ringbone has a genuinely strange feature that sets it apart from most arthritis, and it's worth understanding because it shapes how vets think about it.
The bony buildup causes the pain — new bone rubbing against the joint's structures. But if that buildup continues until it fuses the joint completely, the resulting absence of motion dramatically reduces the arthritic pain. The disease, taken far enough, can relieve itself.
This is why, in high ringbone especially, some horses become usable again once the pastern joint fuses — and why vets sometimes choose to speed that fusion up surgically (arthrodesis) rather than let a horse endure years of lameness waiting for it.
⚠️ But don't over-read the X-rays
Here's a subtlety even some owners with years of experience miss: serial X-rays that look like the joint is "gradually fusing" often aren't showing fusion at all. The more likely explanation is that growing new bone around the joint is concealing it on the image, while lameness-related changes reduce the cartilage. True natural arthrodesis is less common than popular opinion assumes.
The takeaway isn't "wait and hope it fuses." It's that fusion is a real but unreliable endpoint, and whether to wait for it or induce it is a decision only your vet can make for your horse.
Signs — and Why You Can't Wait for an Obvious One
- Lameness — often insidious at first, worsening over time.
- A firm, bony enlargement near the pastern or coronet (high ringbone). Low ringbone may show a bony prominence at the coronet only once it's advanced.
- Reduced range of motion and stiffness in the lower limb.
- Heat or discomfort over the joint in active phases.
- Worse on hard or uneven ground, or after work.
⭐ The X-ray can lag behind the lameness
An important diagnostic trap: radiographic changes may lag behind clinical signs. A horse with significant lameness may show relatively mild changes on early X-rays. So a clean-looking early film doesn't rule ringbone out — which is exactly why vets combine nerve blocks (to localise the pain to the pastern region) with radiography, and repeat films over time.
What Actually Helps
Because ringbone can't be cured, management aims to slow progression and keep the horse comfortable. The approaches are veterinary decisions, and which apply depends entirely on the type.
| Approach | What it does |
|---|---|
| Corrective trimming & shoeing | Central to management. Eases breakover and reduces mechanical leverage on the joint by bringing the breakover point toward the centre of the foot. |
| Footing & workload changes | Softer ground, lower intensity, avoiding hard or rocky terrain. Some mild cases stay in light work for years. |
| Anti-inflammatory medication | Manages pain and inflammation; intra-articular steroid injections where appropriate. |
| Weight control | Excess weight exacerbates joint loading and can worsen an established case. |
| Emerging therapies | IRAP, PRP and shockwave are used or under investigation in selected cases — vet-directed. |
| Surgical fusion (arthrodesis) | For high ringbone unresponsive to conservative care. Eliminates painful motion; ~90% survive the surgery itself. |
So Where Does Red Light Therapy Fit?
At the very edge of this, and only with your vet's agreement.
It does not change bone. Ringbone is defined by new bone formation and joint degeneration; light does not remove osteophytes, rebuild cartilage, or reverse the disease. Anyone marketing a light device as a ringbone treatment is describing something that cannot happen.
What's plausible is far narrower: the soft tissues around the joint are within reach of light, and if your vet is running a management plan and believes some comfort support in that periarticular soft tissue helps your individual horse, that's their judgement to make. For the general principles of how light interacts with joints and their limits, our guide to red light therapy for horse joint pain covers the wider picture, and because ringbone is a form of arthritis, our guide to red light therapy for horse arthritis is the broader context this sits inside.
The three lines not to cross
Don't let it replace the diagnosis. With ringbone the type decides whether treatment is even needed — skipping that step is the real mistake. Don't let it treat a joint it can't reach. Light doesn't get into the coffin joint inside the hoof, and it doesn't touch bone. Don't let it delay a lameness workup. Ringbone is progressive; time spent hoping a device helps is time the disease keeps advancing.
On the enlargement you can feel: if you've found a firm bony lump near the pastern, that warrants a proper veterinary lameness examination with nerve blocks and radiographs — not a therapy purchase. The lump might be quiet periarticular ringbone that needs nothing, or the early sign of articular disease that needs managing now. You cannot tell by touch, and neither can we.
Conclusion: With Ringbone, the Type Is the Diagnosis
Ringbone sounds like a single sentence of bad news. It isn't. High or low, articular or periarticular — those distinctions decide whether your horse needs urgent management, years of careful maintenance, or simply monitoring and a normal life. The same word covers all of it.
And it carries a paradox worth holding onto: the bone that causes the pain can, in some cases, eventually end it by fusing the joint — though true natural fusion is rarer than owners hope, and X-rays that seem to show it are often showing something else. None of that is a reason to leave a lame horse untreated, and all of it is a reason to get a real diagnosis.
Red light therapy doesn't change bone, doesn't reach the coffin joint, and doesn't reverse arthritis. At most it's a comfort-support role at the periphery of a vet-led plan — after the type is known, never before. Get the diagnosis first; the PbmEquine equine range will still be here for the modest job it can honestly do. The horse's outcome is decided by the type of ringbone and the vet who manages it — not by a light.
Frequently Asked Questions
Can red light therapy treat ringbone in horses?
No. Ringbone is new bone growth and progressive arthritic change in the pastern or coffin joint — a structural, bony problem. No light device changes bone architecture or reverses cartilage loss. There is a further reason to be careful here that is specific to ringbone: it is incurable and progressive, and once lameness and visible bony enlargement have developed it is usually too late to reverse. So the honest role of red light therapy is narrow at most — possible comfort support for the soft tissues around the joint, within a plan your vet is directing, and only after the type of ringbone has been established. It is never a treatment for the disease itself, and it must never delay the diagnosis that decides whether your horse needs treatment at all — because with some forms of ringbone, the correct answer is no treatment, and with others it is urgent veterinary management.
What is ringbone in horses?
Ringbone is progressive arthritic change affecting the pastern joint or the coffin joint in the horse's lower limb, with new bone forming around the joint — which is where the name comes from. There are two locations: high ringbone affects the pastern joint, which sits between the two small pastern bones above the hoof; low ringbone affects the coffin joint, located where the lower pastern bone meets the coffin bone inside the hoof capsule. Low ringbone is generally harder to detect early because it is hidden inside the hoof. There is also a second, more important distinction: articular ringbone involves the joint surface itself and is degenerative, while periarticular or non-articular ringbone involves bone around the joint without significant joint-surface involvement. That second distinction matters more than the first, because it largely decides the prognosis and whether treatment is even needed.
What is the difference between articular and periarticular ringbone?
It is the distinction that decides your horse's outlook, and most owners have never heard of it. Periarticular or non-articular ringbone involves new bone forming around the perimeter of the joint without significantly involving the joint surface. As long as the horse remains sound and the structures around the joint are undamaged, this form may require no treatment at all. Articular ringbone involves the joint surface directly — the new bone affects where the bones meet and move against each other — and it is degenerative, causes greater pain, and carries a more guarded prognosis. When articular ringbone involves the coffin joint in particular, it can permanently lame the horse. So the same word, ringbone, can describe a finding that needs nothing more than monitoring, or a joint-destroying disease. Only your vet, using nerve blocks and radiography, can tell you which one you are dealing with — and that is why a diagnosis has to come before any decision about therapy.
Does ringbone ever get better on its own?
There is a genuine paradox here. The same bone growth that causes ringbone pain can, in some cases, eventually end it — because if the bony buildup fuses the joint completely, the absence of motion dramatically reduces the arthritic pain. In high ringbone especially, the pastern joint may fuse over time, and because that joint contributes relatively little to normal gait, some horses become comfortable and usable again once it does. However, two cautions apply. First, true natural fusion is less common than owners hope; serial X-rays that appear to show gradual fusion are often actually showing new bone concealing the joint rather than the joint genuinely uniting. Second, the process can take years of ongoing lameness before it happens, if it happens. This is why vets sometimes elect to speed up fusion surgically rather than wait. It is not a reason to leave a lame horse untreated in the hope it resolves — that decision belongs with your vet.
What actually helps a horse with ringbone?
Management aims to slow progression and keep the horse comfortable, because ringbone cannot be cured. Corrective trimming and shoeing are central — the goal is to ease breakover and reduce mechanical leverage on the joint, which shoes achieve by bringing the breakover point back toward the centre of the foot. Softer footing for turnout and exercise, lower work intensity, and avoiding hard or rocky ground all help slow progression, and some horses with mild ringbone continue in lighter work for years with these adjustments. Anti-inflammatory medication and, where appropriate, intra-articular steroid injections are used to manage pain, and weight control matters because excess weight exacerbates the joint loading. For high ringbone that does not respond to conservative care, surgical fusion of the pastern joint — arthrodesis — is an option, with a meta-analysis reporting a 90% survival rate following the surgery itself. Every one of these decisions is veterinary, and depends on which type of ringbone the horse has.
