Stocking up and lymphangitis in horses: what the swelling means and what helps
Cool, puffy legs that go down with a walk are stocking up. A hot, painful or one-sided leg is a same-day call to the vet. How to tell them apart, what causes them and what helps, with veterinary sources.
Short answer: stocking up is cool, painless swelling in the lower legs, usually both hind legs or all four, that eases once the horse moves. Lymphangitis is inflammation of the lymphatic vessels, usually from a bacterial infection, and it is a veterinary problem. Call your vet the same day for a leg that is hot or painful, a swelling in only one leg, or any swelling that comes with fever, lameness or a horse that is off its feed. This is general information, not a diagnosis. If you cannot tell which one you are looking at, call.
We sell compression wraps, so we will say plainly where they help and where they do not. Every source is named.
What stocking up is, and why it goes down with movement
Stocking up is swelling of the lower limbs caused by reduced activity and pooling of blood and lymph, says Jennifer Davis, DVM, PhD, of North Carolina State University, quoted in The Horse. She calls it a very benign condition caused by lack of movement: it is not painful and does not change the horse’s attitude or appetite.
- It affects both hind legs or all four, not a single leg.
- The swelling usually runs from the coronary band to the fetlock, and sometimes up to the hock or knee.
- The leg is not very hot or painful. The horse may be a little stiff.
- There is no fever, lethargy or lasting lameness.
Movement is the fix because it pushes lymph back up the leg. In a younger horse the swelling usually goes down within 30 to 60 minutes of activity. In an older horse, whose lymphatics work less well, it can take hours, says Steven Allday, DVM, in the same article. He sees it most in heavy-muscled and older horses, usually after two or three days stalled following normal activity. Swelling that lasts five to seven days or more can create skin folds that trap moisture and dirt and lead to skin infections.
What lymphangitis is, and why it is an emergency
Lymphangitis is inflammation of the lymphatic vessels, the low-pressure vessels that return fluid from tissues to the bloodstream. It is usually caused by a bacterial infection that spreads into them (Merck Veterinary Manual). The University of Kentucky’s equine programs describe cutaneous lymphangitis as typically affecting the lower part of one hind limb, with a swollen leg, skin nodules that can abscess or drain, and lameness. That is why it gets called “big leg” or “fat leg.”
Treat it as an emergency because delay does lasting damage. Left untreated it can become chronic, with fibrous tissue and permanent limb disfigurement, which is why Kentucky stresses rapid diagnosis and treatment. The Merck Veterinary Manual says ulcerative lymphangitis from pigeon fever needs antibiotics for a month or longer, and that severe or untreated cases become long term, with scarring and hardening of the leg.
The Horse lists signs that point away from stocking up and toward a vet: swelling that returns repeatedly over several days, a protected gait or serious lameness, fever, a limb that is hot to the touch, lethargy and loss of appetite. Cellulitis, hoof abscesses and injuries also swell legs. One mild form, sporadic lymphangitis or “Monday morning leg,” appears in horses stabled for days and usually resolves with exercise, but its cause is not well understood (University of Kentucky), and only a vet can separate it from the infectious kind.
| Sign | Stocking up | Lymphangitis |
|---|---|---|
| Which legs | Both hind legs or all four | Usually one leg, often a hind |
| Heat and pain | Not very hot or painful | Painful, sometimes hot |
| Skin | Intact | May have nodules, sores or discharge |
| Horse’s manner | Normal attitude and appetite | May be dull, off feed or have a fever |
| After a walk | Eases in 30 to 60 minutes in a younger horse | Does not reliably ease |
| What to do | Move the horse; see below | Call the vet the same day |
Causes
Stocking up comes from too little movement. Lymphangitis comes from infection. In pigeon fever, a common cause, the bacteria probably enter through skin wounds, including injections and insect bites, or through contact with contaminated soil, tack or grooming equipment, and unhygienic, wet conditions raise the risk (Merck Veterinary Manual). Kentucky also links infectious cases to poor hygiene and insect transmission. Cellulitis, an infection of the skin and tissue under it that often follows scratches or trauma, is another cause of a hot swollen leg and needs antibiotics from your vet (Davis, in The Horse). Non-infectious lymphangitis exists too, so a diagnosis matters.
What helps
- Movement. Hand-walk or longe lightly. The single best fix, Allday says, is more frequent turnout, and activity on the days you do not ride.
- Cold water. For plain stocking up, hosing the legs with cold water for 20 to 30 minutes can speed things along (Allday). Ask your vet before treating a hot, painful leg yourself; hydrotherapy is part of veterinary treatment for lymphangitis.
- Hygiene and dry ground. The Merck Veterinary Manual recommends good sanitation, fly control and avoiding prolonged damp conditions, though the disease can occur even in well-managed barns. Check legs daily for scratches, cuts and scabs. A dry stall floor helps; see our stall mat guide.
- Compression, used properly. See below.
Uncle Jeeter says: “Cool and puffy and gone after a walk? Turn him out. Hot, sore or just one leg? Phone the vet and don’t wait for morning.”
Where compression wraps fit in
If you cannot increase a horse’s activity, supportive wraps on the lower legs while it is stalled can stop fluid pooling, says Davis in The Horse. Ordinary shipping wraps are fine with adequate padding, worn only while the horse is stalled and with time off each day; she suggests 12 hours on and 12 hours off.
Wraps done badly do harm. The Horse’s bandaging guide, written by a veterinarian and quoting specialists from Auburn and UC Davis, says improper application or the wrong material can do more harm than leaving the leg bare. Compression should be even along the leg, there must be enough padding, and standing wraps should be checked daily and ideally reset at least once a day.
So look for a wrap that gives even, measured compression and is sized to the leg. EquiCrown FIT is sold in five sizes by cannon measurement, front and hind, in regular and short lengths. Its hook-and-eye closure adjusts as swelling comes and goes, and it washes at 40 °C. The product page lists it for stocking up, after work, on the trailer and during stall rest, and for managing a condition like lymphangitis or cellulitis. Read that as alongside your vet’s treatment, not instead of it. FIT Silver adds silver-ion material; its page describes it for horses dealing with mud fever, cellulitis or chronic stocking up.
A wrap supports a leg and helps manage swelling. It does not treat an infection, and lymphangitis needs your vet’s diagnosis and drugs. Never wrap a hot, painful, oozing or freshly wounded leg until the vet has seen it.
Questions people ask
Is stocking up normal in horses?
It is common and benign, caused by lack of movement. Davis says true stocking up usually persists for the horse’s life and may worsen with age without affecting performance. Swelling that lasts more than a few days needs a vet (The Horse).
How long does stocking up take to go away?
Usually 30 to 60 minutes of walking in a younger horse and a few hours in an older one (Allday, in The Horse). If it does not improve or lasts more than a few days, call your vet.
How do I tell stocking up from lymphangitis?
Stocking up is cool, painless, in both hind legs or all four, with a normal appetite. Lymphangitis is usually one leg, painful, sometimes hot, and may come with fever, lameness or a dull horse. If you are not sure, call your vet the same day.
Can compression wraps treat lymphangitis?
No. Treatment is your vet’s: the University of Kentucky lists antimicrobials, anti-inflammatories, hydrotherapy and drainage. Wraps support the leg and help manage swelling alongside that care, as the EquiCrown product page describes.
Should I wrap my horse’s legs in the stall?
Turnout and walking come first. If a horse must stand, wraps over padding for about 12 hours at a time can help (Davis), checked daily, and sized from the cannon measurement on our size chart.
Sources: The Horse, All Stocked Up (Marcia King, quoting Jennifer Davis, DVM, PhD, NC State, and Steven Allday, DVM) and Horse Bandaging Fundamentals (2024); Merck Veterinary Manual, Lymphangitis in Horses (owner version, reviewed by Sharon J. Spier, DVM, UC Davis); University of Kentucky Equine Programs, Cutaneous Lymphangitis in Horses; Farm & Barn Supply EquiCrown product pages.
Next step: if your vet agrees wraps suit your horse, measure first with the EquiCrown size chart, then choose EquiCrown FIT in green/black or FIT Silver. The full range is in horse health and care.
