Managing Windgalls in Horses: Prevention and Treatment

Windgalls in horses (also called windpuffs or wind puffs) are soft, fluid-filled swellings that appear on the back of the fetlock, slightly above and behind the joint. They are one of the most common findings on a UK five-stage vetting and one of the most misunderstood. The vast majority are harmless cosmetic blemishes, but a small minority signal serious tendon-sheath pathology. The distinction matters: dismiss the wrong swelling as “just windgalls” and you can miss a developing chronic tenosynovitis or annular ligament syndrome that ends a competition career. This guide explains what windgalls in horses actually are, how to tell articular from tendinous windgalls, what causes them, when to call the vet, the treatment options that genuinely work, and the buying advice every UK and South African horse owner should know before paying for a vetting on a horse with persistent fetlock swellings.

What Are Windgalls in Horses?

A windgall is a soft swelling caused by an excess of synovial fluid within either the digital flexor tendon sheath or the fetlock joint capsule. The medical name for the more serious form is tenosynovitis of the digital flexor tendon sheath. They typically appear on the hind legs, though front-leg windgalls do occur, and they are usually present on both legs of a pair, often symmetrically. They tend to enlarge after work and in hot weather, then reduce overnight. A horse can carry significant windgalls without any sign of lameness for years.

Windgalls in horses are common across all UK and South African disciplines, but you will see them most in horses that work hard on firm ground: eventers, hunters, polo ponies, racehorses and competition show jumpers. They are also common in older horses with conformational issues such as straight hindlegs or upright pasterns. Despite their prevalence, windgalls remain one of the conditions most likely to cause unnecessary anxiety to first-time owners, and one of the swellings most commonly noted on a five-stage pre-purchase examination.

Windgalls or Windpuffs? Clearing Up the Terminology

If you have searched for “windpuffs” or “wind puffs in horses” and landed here, you are in the right place. Windgalls and windpuffs are two names for the same thing: soft synovial swellings around the fetlock. “Windgall” is the traditional British term, while “windpuff” (or “wind puff”) is used more widely in North America and increasingly in South Africa. Some owners also write it as “wind gall” or “wind galls”. Whichever spelling you use, the underlying condition, the causes and the management are identical, so do not be confused by a vet, insurer or forum using a different word from the one you know.

Articular vs Tendinous Windgalls

The most important clinical distinction is whether the swelling involves the joint capsule (articular) or the digital flexor tendon sheath (tendinous). The two have different prognoses and require different management.

Articular windgalls

Articular windgalls bulge from the fetlock joint capsule, usually appearing as a single rounded swelling at the top of the fetlock just in front of the suspensory branches. They reflect mild low-grade synovitis of the joint and are typically painless and non-progressive. The vast majority of articular windgalls in older or hard-worked horses cause no functional problem.

Tendinous windgalls

Tendinous windgalls are larger, sit further back behind the cannon bone above the fetlock, and reflect tenosynovitis (inflammation) of the digital flexor tendon sheath. They are softer and more diffuse than articular windgalls. Most are still painless and incidental, but a subset progress to chronic proliferative tenosynovitis, where the sheath wall thickens permanently, fluid accumulation becomes harder, and the horse may eventually develop low-grade lameness. Crucially, persistent tendinous windgalls can lead to annular ligament syndrome, where the palmar or plantar annular ligament constricts the swollen sheath and produces a “notched” appearance just above the fetlock. This is a meaningful clinical condition that can require surgery. Horse & Hound’s veterinary guidance reinforces that it is the tendinous type, not the articular type, that warrants the closest monitoring.

What Causes Windgalls in Horses?

Windgalls are not a single disease with a single cause. They reflect a mismatch between the load placed on the structures around the fetlock and the tissue’s capacity to absorb it. The contributing factors are well documented:

• Hard ground — concussion from work on firm or uneven surfaces. UK hunting fields, summer eventing tracks and SA Highveld winter going are all classic windgall-producing conditions.
• Workload — long, fast or repetitive work, particularly trot and canter on roads and stubble.
• Conformation — straight (upright) hindlegs, long sloping pasterns, or asymmetric loading.
• Age — windgalls are more common in horses over 10 simply because cumulative loading rises with mileage.
• Recent change in workload — a horse coming back into hard work after a layoff is more likely to develop new windgalls than one in steady work.
• Standing in the stable — restricted movement allows fluid to pool. Many windgalls reduce after turnout and re-appear after a stable night.
• Hot weather — capillary dilation increases fluid filtration. Windgalls visibly enlarge in summer, especially during UK June to August and SA October to February.
• Poor hoof balance — chronic foot imbalance, untreated hoof cracks, or a low heel and long toe that change how the limb loads.

Windgalls on the Hind Legs vs Front Legs

Owners frequently ask whether windgalls on the hind legs mean something different from windgalls on the front legs. In practice, the location tells you a little about the likely cause rather than the seriousness:

• Hind-leg windgalls are by far the most common. They are usually linked to concussion and cumulative wear, and are very often the symmetrical, painless, cosmetic type seen in hunters and older competition horses.
• Front-leg windgalls are less common and slightly more likely to be associated with a specific tendon-sheath strain, so a new front-leg windgall in a young or previously clean-legged horse deserves a closer look.

In both cases the golden rule is the same: symmetry, coolness and soundness point to a benign windgall, while asymmetry, heat, pain or lameness point to something that needs investigating.

Symptoms and How to Identify Them

The classic windgall is easy to spot once you know what you are looking at:

• Soft, doughy swelling at the back of the fetlock, slightly above and behind the joint.
• Bilateral or symmetrical between paired limbs, especially on the hind legs.
• Larger after work, larger in hot weather, smaller after a night in the stable.
• Cool to the touch, not warm or hot.
• Painless: the horse should not flinch on firm palpation.
• No associated lameness at the trot in a straight line or on small circles.

Compare with the opposite leg. Asymmetry, heat, pain or sudden enlargement are red flags that turn a routine windgall into a vet-call situation.

When to Be Concerned

Most windgalls do not warrant veterinary attention. These do:

1. Asymmetric swelling — one side significantly larger than the other in a paired limb.
2. Warmth or pain on palpation — suggests active synovitis or infection.
3. Sudden enlargement — a windgall that appears overnight after a known injury or jump session.
4. Associated lameness — even mild bridle lameness or shortening of stride.
5. “Notched” appearance above the fetlock — suggests annular ligament constriction.
6. Hard, non-fluctuant swelling — suggests chronic proliferative tenosynovitis with fibrosis.
7. Open wound or skin breach — risk of septic tenosynovitis, a true emergency.

A vet visit for a swollen leg is never wasted. Ruling out tendon, ligament or joint pathology gives you peace of mind and a baseline for future comparison.

Veterinary Diagnosis

If your vet decides the swelling needs investigating, expect a structured workup:

• Lameness examination — including flexion tests of the fetlock and hock.
• Ultrasonography — the gold standard for differentiating articular from tendinous swellings, assessing the tendon sheath wall, and visualising the deep digital flexor tendon, superficial digital flexor tendon and palmar annular ligament.
• Diagnostic analgesia — local anaesthetic blocks if there is concurrent lameness.
• Synovial fluid analysis — if infection or chronic inflammation is suspected, the vet may aspirate fluid for cell count and culture.
• Radiography — to rule out concurrent osteoarthritis or osteochondral fragments.

Treatment Options

Treatment depends on whether the windgall is symptomatic and what type it is.

Cosmetic windgalls (no lameness, no pain)

No treatment needed. Owners often try to “cure” cosmetic windgalls and end up causing more harm than good. The usual recommendation is conservative management:

• Maintain regular varied work: in-hand walking and turnout reduce fluid pooling.
• Avoid concussive work on hard ground where possible.
• Cold-hose or apply ice boots after intense work; 10 to 15 minutes is sufficient.
• Stable bandages or fleece wraps overnight reduce visible swelling but do not change the underlying structure.
• Six-weekly shoeing cycles with an experienced farrier maintain hoof balance and reduce abnormal loading.

Mildly symptomatic windgalls

If the horse is mildly uncomfortable, your vet may recommend:

• A short course of NSAIDs (Bute or meloxicam) under prescription.
• Cold therapy boots used systematically after every work session. Magnetic stable boots are popular for legs that fill overnight, though the evidence behind magnetic boots suggests any benefit comes from the compression of the boot rather than from the magnets.
• Reduced workload for two to four weeks with controlled in-hand walking.
• Reassessment with ultrasound after four to six weeks.

Chronic or progressive windgalls

For tendinous windgalls that progress to chronic tenosynovitis or annular ligament syndrome:

• Intra-thecal medication — corticosteroid injection (often combined with hyaluronic acid) directly into the tendon sheath under ultrasound guidance.
• Annular ligament desmotomy — surgical division of the constricting palmar or plantar annular ligament. Performed standing or under general anaesthesia at a referral hospital. Most horses return to soundness within three to six months.
• Regenerative therapies — platelet-rich plasma (PRP) or stem cell injection into the sheath, used in selected cases.
• Reduced or modified workload — long-term management often means a step down in workload intensity rather than a change of discipline.

Prevention and Long-Term Management

You cannot guarantee a horse will never develop windgalls, but you can stack the odds. The British Horse Society’s health and management guidance underlines that consistent, sensible routine beats any quick fix:

1. Vary the work — do not drill the same surface and same exercise every day.
2. Turn out as much as management allows — movement reduces fluid pooling.
3. Maintain hoof balance — every four to six weeks, with annual radiographic assessment for performance horses.
4. Use cold therapy strategically — after hard work, and before stabling overnight in summer.
5. Match the surface to the work — limit fast work on roads and frozen ground.
6. Build fitness gradually — sudden increases in workload are a key risk factor.
7. Investigate concurrent issues early — uneven shoeing, poor saddle fit, or back pain that changes the loading pattern.

Buying a Horse with Windgalls

“Should I buy a horse with windgalls?” is one of the most common questions on UK and SA horse forums. The honest answer: it depends entirely on what type of windgalls they are, how progressive they have been, and what you intend to do with the horse.

• Small, soft, symmetrical, painless windgalls in an older hunter or competition horse — usually irrelevant. Disclose to your insurer; do not let them block the sale of an otherwise sound horse.
• Large, asymmetric windgalls with a notched appearance — request ultrasound as part of the vetting. Walk away if the report shows chronic tenosynovitis or annular ligament involvement.
• Hot, painful or recently developed windgalls — these are not “old hunters’ lumps”. Get the vet to investigate before completing the sale.
• Young horse with windgalls — concerning. Most young horses should not have windgalls at all. Investigate workload history and shoeing.

Insurance companies routinely add an exclusion for the affected leg even when the windgalls are cosmetic. Factor this into the negotiation; it should reduce the asking price slightly, because future treatment of any condition in that limb will be self-funded.

Frequently Asked Questions

Are windgalls in horses painful?

The vast majority of windgalls are painless and cause no lameness. A small minority, typically tendinous windgalls that have progressed to chronic tenosynovitis or annular ligament syndrome, can cause mild discomfort and reduced performance. Pain on palpation, heat, or associated lameness should always trigger a veterinary assessment.

Can you ride a horse with windgalls?

Yes, in almost all cases. A horse with small, symmetrical, painless windgalls and no lameness can work and compete completely normally, and riding is not only safe but actively helpful because movement discourages fluid from pooling. The exceptions are windgalls that are hot, painful, suddenly enlarged or accompanied by lameness: those horses should be rested and assessed by a vet before you continue ridden work.

How do you treat windgalls in horses?

Most cosmetic windgalls require no treatment beyond maintenance management: varied work, regular farriery and cold therapy after hard work. Symptomatic windgalls may need a short course of NSAIDs and reduced work. Chronic cases involving the tendon sheath are treated with intra-thecal corticosteroid injection or, in advanced cases, surgical annular ligament desmotomy.

Do windgalls go away?

Established windgalls rarely disappear completely, but their visible size fluctuates with workload, weather and turnout. Acute, recently developed windgalls may resolve fully with rest, cold therapy and corrected workload, particularly if caught within the first few weeks.

What is the difference between a windgall and a curb?

Windgalls sit at the back of the fetlock joint. A curb sits on the back of the hock, roughly four inches below its point, and reflects damage to the long plantar ligament. They are entirely separate conditions, and a curb is only one of several swellings that can appear around the hock.

Can supplements help windgalls?

No supplement has been clinically shown to reduce existing windgalls. Joint supplements containing glucosamine, chondroitin and hyaluronic acid are sometimes used as part of a wider joint-health plan, but the evidence base for windgall reduction specifically is weak. Cold therapy, varied work and good hoof balance produce more measurable results than any oral product.