Proud Flesh in Horses Explained: Treatment and Prevention

A cut on a horse's leg that should have closed in a fortnight can still be open three months later, and more often than not the reason is proud flesh. Proud flesh in horses is an overgrowth of healing tissue that rises above the skin edge and physically blocks the wound from closing. It is one of the most common and most frustrating complications of lower limb injury, and almost everything that decides whether you get it is settled in the first few days after the horse hurts itself. This guide covers what it is, why horses are so much worse for it than ponies, how vets actually treat it, and which of the yard remedies you will be offered are worth ignoring.

What Is Proud Flesh in Horses?

Proud flesh is the horseman's name for what vets call exuberant granulation tissue, usually shortened to EGT. It is granulation tissue — the ordinary, necessary repair tissue a body lays down to fill a wound — that has carried on growing long past the point where it should have stopped.

Granulation Tissue Is Meant to Be There

The British Horse Society's WoundWise guidance on wound healing sets out four phases: haemostasis, when the blood vessels constrict and clot within minutes; inflammation, when inflammatory cells clean the wound, which the BHS notes "can last for hours or even weeks"; proliferation, when, in the BHS's words, "fibrous tissue (known as granulation tissue) quickly covers the wound to protect it" and new skin grows in from the edges; and maturation, when the new tissue strengthens over the weeks and months that follow.

That granulation bed is not the enemy. It is the scaffold. Skin cells at the wound margin creep across its surface to close the gap, and without it they would have nothing to migrate over. The BHS puts the failure plainly: "Proud flesh occurs when during the proliferation phase too much granulation tissue is produced." Once the bed grows higher than the surrounding skin, the advancing skin cells meet a cliff instead of a ramp. They stall, the wound stops closing, and the tissue — still under the same signal to grow — keeps piling up.

There is a measurable difference in what that runaway tissue is made of. Partusch and colleagues, publishing in PLoS One in 2025 (PMID 41196884), compared naturally occurring proud flesh in 19 horses against control wounds in 6 horses and found significantly more immature type III collagen in both the surface and the deep layers of the proud flesh, while the total amount of collagen was no different. They also found occluded microvessels and swollen endothelial cells deep in the wound bed. Proud flesh is not simply too much of a good thing; it is tissue that never matures, sitting on a blood supply that is partly strangling itself.

Proud Flesh Is Not Unique to Horses

Horses are far and away the worst affected domestic species, which is why the condition is so strongly associated with them, but the same process is recognised in human medicine, where exuberant granulation is described in wounds that heal slowly under similar conditions — including, for example, a reported case complicating an episiotomy wound that needed surgical excision before it would settle. It is worth knowing simply because it tells you what kind of problem this is: not a horse-specific curse, but a general failure of wound repair that horses' lower legs happen to be built to produce.

Why Horses Get Proud Flesh and Ponies Often Do Not

This is the part most owners are never told, and it changes how you read your own horse's risk. The classic work is Wilmink and colleagues' 1999 study in the Equine Veterinary Journal (PMID 9952330), which created matched, standardised wounds on the distal limbs and hindquarters of 5 horses and 5 ponies and photographed them weekly.

Two findings came out of it. Second-intention healing — healing across an open wound rather than a stitched one — was significantly faster in ponies than in horses, and body wounds healed significantly faster than lower limb wounds. But the striking result was what happened to the horses' limb wounds specifically: they grew. In Wilmink's words, those wounds "increased to almost twice their original size in the first 2 weeks", proud flesh was persistent, skin growth started later, and wound contraction — the process that does most of the work everywhere else on the body — barely contributed at all.

If you are watching a fresh cannon bone wound get bigger rather than smaller in the first week or two, that is not necessarily your management going wrong. It is the documented behaviour of that wound in that location on that species.

Wilmink and van Weeren later set out the mechanism in Veterinary Clinics of North America: Equine Practice in 2005 (PMID 15691597). In ponies, white blood cells produce more inflammatory mediators, which gives better local defence, faster cleaning up of dead tissue, and a quicker move into the repair phases with more contraction. In horses, the leucocytes produce fewer mediators, so the initial inflammatory response is weak — and a weak inflammatory response does not resolve, it becomes chronic. Chronic inflammation then inhibits contraction and drives exuberant granulation. The practical translation is counter-intuitive: proud flesh is not the result of too much inflammation at the start, but of too little, dragging on too long.

For British and South African owners this matters, because a great many of our horses are natives, cobs and pony crosses rather than Thoroughbreds and warmbloods. It does not make a pony's leg wound trivial, and it is not a reason to take one less seriously. It does mean the risk sitting in front of you genuinely differs between the 16.2hh competition horse and the Welsh cob in the next box.

The Lower Limb Is Where It Happens

Proud flesh is overwhelmingly a below-the-knee-and-hock problem. Wilmink's study used wounds over the metatarsal region — the hind cannon — precisely because that is where the condition reliably appears. Several things stack up there at once:

• There is almost nothing between skin and bone. A wound on the shoulder or quarters sits in loose, well-padded, mobile skin that can be drawn together and stitched. A wound on the cannon or pastern has tendon, ligament and bone immediately beneath a thin skin envelope.
• The skin cannot pull itself closed. The BHS puts it simply: "In the lower limb, contraction is very limited, so healing is often slower and scarring is more common." Take contraction away and the wound has to be filled by granulation tissue and covered by skin creeping in from the edges — the two slowest routes available.
• Blood supply and drainage are poorer. Less perfusion means a slower start to the inflammatory phase, which is exactly the weak-then-chronic pattern Wilmink and van Weeren described.
• Gravity works against you. Fluid pools in a standing horse's lower leg, and swelling lifts the granulation bed further above the skin margin.

Movement, Joints and Wounds That Will Not Stay Still

Every stride bends the fetlock and pastern, and a wound over a moving joint is pulled apart and re-torn all day long. Bertone and colleagues' 1985 study in the American Journal of Veterinary Research (PMID 4026023) created 36 standardised limb wounds in 6 horses and 3 ponies and tracked them. All the wounds enlarged up to day 15, and the dorsal fetlock wounds enlarged significantly more than the metatarsal ones — the extra motion at the joint showing up directly in the measurements. The same study tested a topical collagen gel and found no significant difference in proud flesh formation, skin growth or contraction against untreated controls, which is a useful early warning about topical products generally.

The BHS classes wounds over the stifle, hock, fetlock, pastern, knee, elbow, shoulder and the lower limb as high risk and requiring urgent veterinary attention, on the grounds that damage to a synovial structure "can have significant and long-term complications". Wounds at the hoof and coronet band get the same urgent classification, partly because damage to the coronet can affect how the hoof grows out afterwards. That urgency is about protecting joints and tendon sheaths first — but the same early veterinary attention is what prevents proud flesh, so the two goals point the same way.

Dirt, Infection and Inflammation That Never Switches Off

Lower leg wounds sit at mud, manure and sand height, so contamination is close to guaranteed. Persistent low-grade infection keeps the wound stuck in that chronic inflammatory state, and chronic inflammation is the engine of proud flesh rather than a side effect of it.

Morales Yñiguez and Leise, writing in Veterinary Clinics of North America: Equine Practice in 2025 (PMID 41033902), note that over 25% of all equine emergencies are wounds, which they describe as the most common condition vets treat. That is a view from Louisiana State University. Closer to home, a University of Nottingham study of more than 2,600 out-of-hours first-opinion cases (Bowden and colleagues, Veterinary Record 2020, PMID 32719083) found colic the most common reason for a call-out at 35 per cent, with wounds second at 20 per cent. Morales Yñiguez and Leise list infection and biofilm formation as common causes of delayed healing, alongside foreign material left in the wound, bone sequestrum, exuberant granulation tissue itself, neoplastic transition and habronemiasis. Occasionally the organism involved is an unusual one - nocardiosis is one of the wound infections that can keep a limb wound grumbling on when routine treatment is not shifting it.

Infection in a lower limb can also escalate well beyond the wound itself. Cellulitis and lymphangitis both commonly follow a small, unremarkable-looking break in the skin of the lower leg, and both are considerably more serious than the wound that let them in.

What the Research Still Cannot Tell Us

It is worth being straight about the state of the evidence, because it explains why the advice you find online contradicts itself so freely. Anantama and colleagues' 2022 review in The Veterinary Journal (PMID 35093532) searched the literature systematically and concluded that the mechanisms behind proud flesh remain unclear and that effective strategies to prevent or treat it are lacking. Of the controlled clinical trials they could find, 35 were eligible for review; all 35 were run in university hospitals, all but one used surgically created, uninfected wounds, and the animals were overwhelmingly horses (230) with only 18 ponies and 14 donkeys between them.

Ribeiro and colleagues reached a similar verdict in their 2024 scoping review of second-intention wound healing protocols, which extracted data from 81 publications and found a lack of evidence for adopting any single treatment protocol, with many treatments producing controversial results.

In other words: tidy, clean wounds on university horses are what most of the evidence is built on, and your muddy field injury is not that. Anyone selling you certainty about a cure is selling you something the literature does not have.

What Proud Flesh Looks Like on a Horse

Healthy granulation tissue and proud flesh are the same tissue at different stages, so the distinction is about level, texture and behaviour rather than a different-looking substance. Colour will not separate them: Horse & Hound’s vet library, approved by Karen Coumbe MRCVS, describes normal healing tissue as red-pink and proud flesh as knobbly, pink and shiny.

What you are looking at	Healthy granulation tissue	Proud flesh
Level	Flat, sitting at or just below the skin edge	Raised above the surrounding skin, sometimes markedly
Colour	Red-pink	Pink and shiny, sometimes with a yellowish tinge
Surface	Fine and even	Lumpy, cobbled or cauliflower-like, sometimes cracked
Skin at the margin	A pale rim visibly advancing inwards	No advancing rim; the skin edge looks stalled or buried
Bleeding	Minor if knocked	Bleeds readily and heavily from the slightest contact
Direction of travel	Getting smaller week on week	Static or getting larger

The bleeding is the giveaway most owners notice first. Proud flesh is densely packed with small blood vessels but contains no nerve endings, so it does not hurt the horse and it bleeds dramatically out of all proportion to the knock that caused it. A leg wound that paints the stable wall when the horse catches it on the door frame, but that the horse seems entirely unbothered by, is behaving exactly like proud flesh.

The most useful assessment, though, is not a single look but a series. Photograph the wound in the same light, from the same angle, with something for scale, at regular intervals. A wound that is smaller this week than last is healing. One that is the same size or larger, with no pale rim of new skin creeping in from the edges, has stopped healing and needs the vet back.

Proud Flesh Look-Alikes: What Else It Could Be

This section matters more than its length suggests. Every lump of red tissue in a wound is assumed to be proud flesh, and some of them are not. Getting it wrong is not neutral, because a few of the alternatives are made actively worse by being treated as proud flesh.

• Sarcoids. The fibroblastic form of a sarcoid is a fleshy, red, ulcerated, often bleeding mass that can appear at the site of an old wound and closely resembles proud flesh. Sarcoids are the most common skin tumour in horses, and there is a long-recognised association with sites of previous skin trauma. Repeatedly cutting into one can provoke it rather than resolve it, which is why a vet will want to be confident about what they are dealing with before treating aggressively. Our reference entry on equine sarcoids covers the different types.
• Neoplastic transition. Morales Yñiguez and Leise list this among the recognised causes of non-healing wounds. A chronic wound that has been open for months can develop tumour change, including squamous cell carcinoma. A wound that has been static for a very long time deserves a fresh opinion rather than another round of the same treatment.
• Habronemiasis (summer sores). Also on their list. Larvae deposited by flies into a wound provoke intensely itchy, ulcerated, granulomatous lesions that mimic proud flesh. This is far more relevant in South Africa and other warm climates than in a British winter, but it is a genuine seasonal differential, and the itchiness is the clue — proud flesh does not itch.
• A foreign body or bone sequestrum. A thorn, splinter, fragment of wire or a piece of dead bone left in the depths of a wound will keep it inflamed and open indefinitely. Removing the cause is the treatment; trimming the tissue above it is not.
• Simple healthy granulation on a big wound. A large open wound can carry a substantial, perfectly normal granulation bed. If it is flat and the skin edge is advancing, it is not proud flesh and does not need cutting.

Photographs are no substitute for a hands-on assessment here. If a wound is not progressing, the question to ask your vet is not only "how do we get rid of this proud flesh" but "are we sure that is what this is".

Treating Proud Flesh in Horses

There is no single reliable cure, and as the reviews above make clear, that is a statement about the evidence and not about your vet. Treatment is a combination of removing what has overgrown, addressing why it overgrew, and giving the skin edge a flat surface to work across.

Debridement and Trimming

Cutting the excess tissue back level with the surrounding skin is the mainstay. Maher and Kuebelbeck, reviewing non-healing equine limb wounds in Veterinary Clinics of North America: Equine Practice in 2018 (PMID 30447769), concluded that an underlying source of inflammation or infection is almost always present and has to be resolved before healing will proceed, with debridement the mainstay of achieving that.

Two things surprise owners watching it done. It does not hurt — the tissue has no nerve supply, so trimming is usually straightforward in a sedated, standing horse. And it bleeds copiously, because of all those small vessels. Neither is a sign anything has gone wrong.

Where proud flesh has been left to build into a large mass, it often cannot be dealt with in one session and your vet will work through it in stages, at intervals they judge from how the wound responds. This is the single strongest argument for acting early: a small amount of proud flesh caught quickly is a short job, while a large established mass becomes a course of repeat visits with a correspondingly long recovery.

Topical Treatments and What the Evidence Shows

The best field evidence on this site comes from Engelen and colleagues' 2004 multicentre randomised controlled trial in the Canadian Veterinary Journal (PMID 15025151), which is unusual for being large and for using naturally occurring wounds rather than surgical ones. They enrolled 481 horses and ponies with real lower limb wounds across Belgium, Germany, France and the United Kingdom, and treated them either with ketanserin gel or with a standard positive control. Treatment continued until the wound healed, which counted as success, or until it formed proud flesh or became infected, either of which counted as failure.

Ketanserin succeeded in 88% of cases, and wounds treated with it were 2 times more likely to heal successfully than those treated with the malic, benzoic and salicylic acid cream used as the control in France and the UK, and 5 times more likely than those treated with ethacridine lactate solution. That is a meaningful result from a realistically messy population of wounds, and it is the sort of evidence to ask your vet about rather than the anecdotes attached to most yard products.

Set against that, Bertone's collagen gel produced no measurable benefit at all, and Wise and colleagues, publishing in PLoS One in 2018 (PMID 29763436), found that topical orf virus proteins did speed up the resolution of proud flesh once it had formed but did not prevent it developing in the first place. The pattern across the literature is that plenty of things help a bit, few things help reliably, and nothing yet abolishes the problem.

Steroid Creams and Hydrocortisone

Topical corticosteroids are a legitimate and commonly used tool. They damp down the inflammation driving the overgrowth and slow the tissue regrowing after it has been trimmed, and your vet may prescribe one to use alongside debridement.

They are also prescription medicines, and the reason to respect that is not bureaucratic. The same anti-inflammatory action that suppresses excess granulation also suppresses the healing you want, and can suppress local defence against infection. A steroid cream applied to a wound that is actually infected, or one left on long after the proud flesh has resolved, makes the wound worse. Use them on your vet's instruction, on the wound they prescribed them for, and stop when told — not on the next wound, next season, out of the same tube.

Bandaging: The Honest Picture

This is where well-meant advice most often goes wrong, because the honest answer has two halves that sound contradictory.

Bandaging a limb wound promotes proud flesh. This is not a fringe view. Wise and colleagues' 2018 experiment deliberately bandaged limb wounds on four horses and kept them bandaged until full healing specifically in order to induce proud flesh, and stated the position flatly: bandaging of limb wounds in horses leads to the formation of exuberant granulation tissue, and it is not seen if wounds are left undressed or if they are on the body. Wilmink and van Weeren said the same in 2005, listing the common use of bandages during treatment alongside chronic inflammation as the reason proud flesh is so frequent in horses' limb wounds.

And yet the same 2005 paper concludes that bandages and casts "are advantageous in many respects and play an important role in support of the overall healing process". They keep contamination out, control swelling, immobilise the wound, protect it from further trauma and keep dressings in place. The BHS notes separately that bandages applied incorrectly "can result in pressure points, sores and cause damage to your horse's limbs", which is a different risk again.

So bandaging is neither good nor bad in the abstract. It is a trade-off with a known cost, and the person who should be deciding how long it runs for is the vet managing that wound. What you should not do is put a bandage on a leg wound and leave it running indefinitely because it seems tidier, or assume that because bandaging is standard early on it should continue to the end. Ask explicitly when the bandaging is coming off, and why.

Skin Grafting

For large wounds that will not close, grafting moves from last resort to sensible plan. Williams, Pezzanite and Hendrickson's 2024 review of skin grafting in equine wounds in Equine Veterinary Education (PMID 39246829) describes it as a technique within reach of equine practitioners rather than a referral-only procedure, provided the groundwork is right.

Their conditions for success are the useful part for owners. Grafts should go into wounds that are free of infection and carrying a healthy granulation bed, the bed should be prepared beforehand with a moist wound dressing, and motion at the graft site must be reduced in the early post-operative period. Where it works, the graft covers the granulation tissue and encourages contraction and skin growth while reducing exuberant granulation — so grafting is not only a way of closing a hole, it is also a treatment for the proud flesh problem itself.

Home Remedies for Proud Flesh: What Not to Put on a Wound

Ask around any yard and you will be offered a caustic powder, a copper sulphate preparation, a bloodroot-based paste, bicarbonate of soda, a home-mixed astringent, or something in an unlabelled jar that belonged to someone's grandfather. These circulate because they appear to work: they burn the proud flesh back and the lump visibly shrinks.

The problem is that none of them can tell the difference between the tissue you want gone and the tissue you need. Proud flesh has no nerve endings, but the delicate rim of new skin creeping in from the wound margin does — and that rim is the only thing that will ever close the wound. A caustic applied to the middle of a granulation bed also reaches the edges, kills the advancing skin cells, and sets healing back past where it started. The lump gets smaller and the wound gets further from closing, which is why these products can look effective and still be losing you ground.

Powders carry a second problem the BHS names directly: they "can also clump together when applied to a wound and trigger a foreign body response" — in other words, the powder itself becomes a piece of debris the wound then has to react to, adding exactly the chronic inflammation that drives proud flesh in the first place.

The BHS's step-by-step wound guidance is blunt about the first-aid stage: clean the wound "using a mains water source or drinkable water until you're able to assess" it, and "don't apply any creams, treatments or give your horse any medication before your vet arrives", because "some treatments can cause more damage to sensitive tissues involved in wound healing". World Horse Welfare's wounds and first aid guidance, externally reviewed by Dr Chris Tufnell FRCVS, takes the same line on keeping a simple, properly stocked kit rather than a shelf of remedies.

Our own position, stated plainly as ours: clean water, a clean covering, and a phone call will serve a leg wound better than anything you can buy to put on it, and the products worth using on established proud flesh are the ones your vet chooses and supervises. If something in a jar genuinely dissolved proud flesh without harming skin, the trials above would have found it.

How to Prevent Proud Flesh in Horses

Prevention is a different and far more winnable game than treatment, and nearly all of it happens in the first few days.

Get the Wound Seen Early

This is the one that matters most. A lower limb wound that can be cleaned and stitched closed soon after the injury largely sidesteps the whole problem, because the skin edges are brought together before a granulation bed has any chance to overgrow. Morales Yñiguez and Leise state the principle directly: wounds should be closed primarily when possible.

Whether a given wound can be stitched depends on how contaminated it is, how much tissue has been lost, where it sits and how long it has been open — that is your vet's judgement, not a rule you can apply from a photograph. What is in your hands is the delay. Call the day it happens rather than waiting to see how it looks in the morning. The window in which closure is an option is the thing you are protecting, and every hour of "let's see" spends some of it.

Clean It, Then Keep It Clean

Contamination sustains the chronic inflammation that produces proud flesh, so the cleaner the wound stays through the early healing phase, the better the odds. That means clean water rather than improvised antiseptics at the first-aid stage, and then following whatever dressing regime your vet sets rather than improvising a new one each day.

Limit Movement Early On

Given how clearly Bertone's fetlock wounds showed the cost of motion, restricting movement while a lower limb wound is establishing is genuinely worthwhile. For a fit horse this is an unpopular conversation, but a period of restricted turnout or box rest during early healing changes the outcome in a way that no topical product reliably does. Balance it against the fact that prolonged box rest brings its own problems, and agree the plan with your vet rather than guessing.

Look Under the Feathers

On cobs, natives, Clydesdales and anything else carrying heavy feathers, a pastern or heel wound can go unnoticed for days under the hair, by which time the early window has closed. Run your hands down all four legs daily and part the feather to look at the skin, rather than relying on a glance across the field. The same habit catches the small overreach that would otherwise become a problem — overreach injuries to the heel bulbs and pastern are a classic route to a wound in exactly the worst place for proud flesh.

Keep Tetanus Cover Current

This is not a proud flesh measure, but it belongs in any conversation about leg wounds. Horses are exceptionally susceptible to tetanus and a small, dirty puncture is the classic route in. Make sure tetanus vaccination is up to date before you need it, and tell your vet the horse's vaccination status when you call about any wound.

Feed for Repair

Tissue repair needs adequate protein and an appropriately balanced diet, and a horse on a properly balanced ration is better equipped to heal than one that is not. Keep the claim that size, though: good nutrition supports normal healing, but it will not overcome the anatomy of a lower limb wound, and no supplement prevents proud flesh. If your horse is on a restricted or unbalanced diet, that is worth reviewing with a nutritionist as part of general horse care rather than as a proud flesh treatment.

When to Call Your Vet

For the wound itself, the BHS lists excessive bleeding, a foreign object lodged in the wound, a wound in one of its high-risk areas, or a horse that is extremely distressed as reasons to contact a vet — and adds the sensible catch-all that "if you're unsure if you need a vet, we recommend phoning them, many vets can review photos or videos and advise you". On this site, we would put any wound below the knee or hock in the call-them category by default, because that is where the whole proud flesh problem lives and because the option to close the wound expires.

Once a wound is healing, call again if:

• The tissue in the wound is rising above the level of the surrounding skin.
• The wound bleeds heavily when knocked but the horse appears untroubled by it.
• There is no pale rim of new skin advancing in from the edges.
• The wound has stopped getting smaller, or has started getting bigger, once the early enlargement phase described above has passed.
• There is new heat, swelling up the limb, discharge, a fever, or increasing lameness — any of which suggests infection rather than simple overgrowth.
• A wound that was healing has changed character, or one that has been open for months looks different — worth a fresh assessment rather than more of the same treatment.

Proud flesh is common, it is not an emergency in the way a joint wound or a heavy bleed is, and it is not a reflection on your horsemanship — the research says plainly that horses' lower limbs are built to produce it. But it is a problem that rewards early, unglamorous action far more than it rewards clever products. Get leg wounds looked at on the day, keep them clean, keep the horse quiet while they establish, and take the vet's advice on when the bandaging stops. Most wounds handled that way close up without ever becoming the six-month saga this article exists to describe.

Frequently Asked Questions