A close view of a horse's front hooves standing square on pavement
Guide · 4 min read

Horse Abscess: Causes & Care

First published September 2020 · Revised 2026Written by Kara Gardiner, Nzymes Equine Specialist

Have you wondered why your horse was completely normal yesterday, but today won't put any pressure on their foot? No apparent leg or hoof issue, no injury, just sudden and painful lameness. One possibility is a hoof abscess.

Surprised by an abscess

Fine yesterday. Three-legged today.

Hoof abscesses happen when bacteria get stuck between the sensitive laminae, the tissue layer that holds the hoof capsule to the coffin bone, and the hoof wall or sole. The bacteria create pus, an infection that quickly builds up and applies pressure behind the sole or division of the hoof.

That pressure can become extremely painful, and cause extreme lameness in your horse overnight.

What can cause one

Six ways bacteria get in.

1.

A puncture wound to the sole or hoof wall, or a pebble or rock lodged in it.

2.

Shoeing nails that came too close to the laminae, or difficulties shoeing.

3.

Laminitis, navicular disease, or a reaction to bruising.

4.

Trauma to the soft layers of the hoof.

5.

Contraction of the heels: heel bulbs grown too close together, forming a pocket.

6.

Going from dry to wet ground conditions repeatedly, or standing in wet conditions for long periods.

Expressing the abscess

It has to come out.

For us humans, a pimple or boil would be the best comparison: the hoof abscess needs to be emptied. The most common strategy is to open it and let it drain. Some will even pop on their own, often after the pus travels up the hoof to the coronary band or heel bulbs. Naturally, it's easier for an abscess to break through via the path of least resistance, where the wall is thinner.

A vet is the best choice for draining

A vet can diagnose and drain the abscess if it doesn't pop on its own, and the best timing is within a 3-day window of onset. It can take 7 to 10 days to close after draining completely. You should see your horse feeling much more comfortable a few hours after the abscess is drained, but the soreness will continue for several days or weeks, depending on the severity.

Then: clean, bandage, and keep it dry

Draining, soaking, bandaging, and keeping the hoof clean are crucial. Regular farrier care and a clean environment help prevent recurring abscesses. And don't leave the horse standing in wet pasture for prolonged periods; the feet and hooves need time to dry out.

For a deeper look at treatment, see this vet's guide: the Merck Veterinary Manual on hoof abscesses in horses.

Nzymes suggested support

The support protocol, with doses.

Alongside the vet's work on the hoof itself, this is the internal and topical support we suggest. Double the Granules amounts during the first 2 weeks; doubling is important with any kind of injury issue.

Sprouted Granules, 2 lb bag
Add to feed · twice daily

Sprouted Granules

600 to 750 lbs3 level tsp
750 to 1,000 lbs4 level tsp
1,001 to 1,250 lbs5 level tsp
1,251 to 1,500 lbs6 level tsp
Bac-Pak Plus, 400 g
Add to feed · once daily

Bac-Pak Plus, 400 g

A powerful and cost-effective probiotic and digestive enzyme blend.

600 to 1,000 lbs2 to 3 one-gram scoops
1,001 to 1,250 lbs3 to 4 one-gram scoops
1,251 to 1,500 lbs4 to 5 one-gram scoops
Ox-E 8 oz Refiller and Ox-E Drops Concentrate
Orally · twice daily

Ox-E Drops Concentrate

Give the horse 20 drops mixed in 8 to 10 cc's of water with a syringe. Squirt slowly along the teeth-line to avoid choking. Twice daily for internal anti-microbial support.

Note: the 8 oz Ox-E Refiller is the best fit for these issues with horses.

Ox-E Mineral Mist
Topical · 3 to 4 times daily

Ox-E Mineral Mist

Three to four times daily, and before applying each new clean dressing, spray or sponge the Ox-E Mineral Mist onto the affected areas of the hoof or leg.

We believe you will have success, and the 120-Day Worry-Free Guarantee stands behind every product sold.

The vet drains the abscess.
You supply the recovery it draws on.

Questions horse owners ask
Why is my horse suddenly so lame when I can't find an injury?

That's the signature of a hoof abscess. The infection builds pressure inside a hoof that has no room to give, so a horse that was fine yesterday won't bear weight today. The lameness looks dramatic precisely because the pressure has nowhere to go.

Can I just wait for it to burst on its own?

Some abscesses do eventually break out through the coronet band or sole, but waiting means days of real pain and pressure. Get your vet or farrier out to locate and drain it; relief usually follows quickly once the pressure is released.

How do I keep abscesses from coming back?

Regular farrier care, a clean environment, and dry feet. Don't leave the horse standing in wet pasture for prolonged periods; hooves need time to dry out. Picking out the feet regularly also lets you catch a problem before it settles in.

Why double the Granules for the first two weeks?

Doubling is important with any kind of injury issue. It front-loads the enzyme support while the body has its biggest repair job to do, then you drop back to the standard amounts for your horse's weight.

Which Ox-E size should I get for a horse?

The 8 oz Ox-E Refiller. At 20 drops twice daily, a horse works through the small concentrate bottle quickly, so the Refiller is the practical fit. And every product is backed by the 120-Day Worry-Free Guarantee.

Mid-abscess and unsure?

An abscess is miserable to watch. Kara's walked it with her own herd.

Kara is the equine specialist on our customer care team, she keeps her own herd on a farm in Saskatchewan, and she trims her own horses' hooves herself. Tell her what you're seeing and she'll tell you honestly where to start. Read Kara's story →

The consultation is free, and it always will be.

1-877-816-6500 · Orders & quick questions
Kara with one of her horses
Kara · Equine specialist