11 min read Last updated: January 2026 Hot, ballooned leg and a horse that won't weight-bear? This UK 48-hour action plan tells you exactly what to do: call your vet, start 5-10 days of NSAIDs/antibiotics, and pair cold therapy with firm compressionso you see improvement within 24-48 hours and protect long-term soundness. Quick Summary Short on time? Here are the key takeaways. Area: Immediate Vet Contact What To Do: Call your vet at the first sign of a hot, swollen, nonweightbearing limb or a temperature above 38.6C; treat it as an emergency. Why It Matters: Fast action limits lymphatic damage and reduces the risk of chronic enlargement. Common Mistake: Waiting to see if it settles before calling the vet. Area: NSAIDs + Antibiotics What To Do: Start a 510 day course of NSAIDs and vetprescribed antimicrobials as directed. Stick to timing and complete the course. Why It Matters: Rapidly reduces pain and inflammation while targeting bacteria before they spread. Common Mistake: Using leftover drugs or stopping early once the leg looks better. Area: Cold & Compression What To Do: Cold hose or ice for 1020 minutes two to three times daily, then apply wellpadded, firm stable bandages; change at least daily and bandage pairs where possible. Why It Matters: Cold reduces inflammation and compression supports lymphatic drainage. Common Mistake: Applying heat, uneven/overtight bandaging, or bandaging over wet skin. Area: Controlled Movement What To Do: Begin short, frequent inhand walks as soon as its safe and tolerated; increase gradually while tracking heat and swelling. Why It Matters: Movement drives lymph flow and helps clear oedema. Common Mistake: Prolonged strict box rest or turning out in deep mud too soon. Area: Early Cultures & Imaging What To Do: Ask for bacterial culture and sensitivity before antibiotics when feasible, or within 2448 hours if response is poor. Add ultrasound and radiographs (Xrays) to locate fluid pockets or deeper involvement. Why It Matters: Guides targeted antibiotic choice and uncovers complications early. Common Mistake: Waiting a week before sampling or imaging. Area: Monitor & Escalate What To Do: Check temperature twice daily and record heat, swelling and lameness; if no improvement within 2448 hours, escalate with cultures, imaging and treatment changes. Why It Matters: Timely coursecorrection prevents chronic oedema and recurrence. Common Mistake: Ignoring persistent fever, worsening lameness or spreading swelling. Area: Skin Care & Dryness What To Do: Keep legs clean and dry; clip if needed and treat small cuts or mudfever promptly; manage turnout and bedding to avoid damp. Why It Matters: Healthy skin is the main barrier to bacterial entry and recurrence. Common Mistake: Leaving mud on, using wet rugs/bedding, or neglecting minor wounds. Area: Steroids & Advanced Compression What To Do: Use shortterm corticosteroids only in severe, selected cases and always alongside aggressive antibiotics; consider automated coldcompression sessions for 34 days if oedema persists. Why It Matters: These adjuncts can shift stubborn swelling but dont replace core therapy. Common Mistake: Using steroids as firstline or relying on devices instead of basics. In This Guide What is cellulitis in horses? How urgently should I treat cellulitis? What does effective UK treatment look like in the first 510 days? When should I request cultures, scans, and blood tests? Are steroids or advanced compression ever appropriate? What daily management speeds recovery and prevents recurrence? What should I expect timeline, red flags, and when to escalate? Your horse comes in from the field with a hot, ballooned leg and wont put weight on it. In the UK, that often spells one thing: cellulitis. Quick, decisive action over the next 2448 hours will make the difference between a straightforward recovery and months of chronic swelling.Key takeaway: Treat suspected cellulitis as an emergency call your vet, start 510 days of NSAIDs and antibiotics under veterinary direction, and combine cold therapy, firm compression, and controlled movement to protect your horses long-term soundness.What is cellulitis in horses?Cellulitis in horses is a bacterial infection of the skin and subcutaneous tissues, usually affecting a single limb and causing sudden, painful swelling, severe lameness, and fever above 38.6C (101.5F). Left unchecked, inflammation rapidly escalates as bacteria and toxins spread through the soft tissues, compromising lymphatic drainage and making the leg look and feel wooden. Common entry points for bacteria include minor cuts, mud-fever scabs, cracked heels, or even insect bites.In the UK, cellulitis is common, particularly through wet autumn and winter when skin integrity is easily compromised by persistent mud and damp bedding. Typical signs youll notice are heat and diffuse swelling up to the stifle, marked pain on palpation, reluctance to move, and a depressed or febrile horse. As our own guide outlines, a rectal temperature over 38.6C alongside acute limb swelling is a strong indicator to call your vet immediately.Outcomes vary with speed of treatment: published survival for bacterial cellulitis ranges from roughly 55% to 89%, and horses that transition to a chronic state often require ongoing management. Early, aggressive therapy dramatically improves the odds of a full return to work.How urgently should I treat cellulitis?Treat cellulitis immediately and as aggressively as your vet recommends; many horses show improvement within 2448 hours when therapy starts promptly. Delays allow bacteria and inflammation to damage the lymphatics, increasing the risk of long-term, irreversible limb enlargement.As equine clinician Dr. Stephen Fogle emphasises in Equus Magazine:The longer the leg stays swollen, the greater the risk for complications. It is crucial to treat acute cellulitis right away and be as aggressive as possible, within the owners financial ability.Owners commonly see a positive shift reduced heat, softening of oedema, a brighter horse within 2448 hours of starting appropriate antimicrobials and anti-inflammatories. If improvement stalls, escalate quickly: more diagnostics in the first few days are far more effective than waiting a week. Research from TheHorse.com warns that swelling persisting beyond one week risks chronic limb enlargement that is harder (sometimes impossible) to reverse.What does effective UK treatment look like in the first 510 days?Standard UK treatment is 510 days of NSAIDs and antimicrobials under veterinary oversight, plus cold hosing/cryotherapy and light, controlled exercise to restore lymphatic flow. This aligns with British Equine Veterinary Association (BEVA) guidance and typical UK practice surveyed across clinicians.Heres what that usually means in real life:Antimicrobials: Your vet selects an antibiotic based on clinical signs, and ideally, culture results (see next section). Complete the full prescribed course.Anti-inflammatories (NSAIDs): Reduce pain, heat, and swelling to help your horse move movement is essential to clear oedema.Cryotherapy: Cold hosing for 1020 minutes two to three times daily, or use cold packs/boots if taps are frozen or turnout is muddy. Many UK owners opt for reusable ice boots as a practical winter solution see our range of horse boots and bandages for cold therapy and compression.Compression: Apply a well-padded, firm stable bandage (changed at least daily) to support lymphatic drainage. Bandage pairs of limbs when possible to maintain symmetry.Controlled movement: Begin short, in-hand walks as soon as your horse tolerates it (safety first). Light exercise improves circulation and prevents stiffness.Veterinarians may also monitor response with serial blood tests, especially Serum Amyloid A (SAA). As reported by Horse & Hound, trending SAA helps clinicians objectively decide whether a protocol is working or needs adjusting. Expect your vet to reassess within 2448 hours and modify treatment if progress is slow.Quick tip: UK prescribing is regulated by the RCVS; never start or change antibiotics without your vet. Complete the full course to avoid relapse and resistance.When should I request cultures, scans, and blood tests?Ask your vet to collect bacterial culture and sensitivity samples before starting antibiotics whenever possible, or within 2448 hours if response is poor; add ultrasound or radiography if swelling fails to settle or deeper structures are suspected. Early data guides targeted antimicrobial choices and avoids chasing the problem with the wrong drug.Guidance from WestVETS is clear: culture and sensitivity are most effective if performed before antibiotics. If your horse already started treatment, sampling is still useful when theres little improvement. Ultrasound can identify fluid pockets for sampling and reveal involvement of tendons, ligaments, or subcutaneous abscesses; radiographs help rule out bone issues including septic changes or concurrent problems like a penetrating wound.Where available and warranted, advanced imaging (CT/MRI) may be considered in complex or non-responsive UK cases, particularly at referral centres. Alongside imaging, serial SAA blood tests as highlighted by Horse & Hound provide an objective yardstick so you and your vet can justify intensifying, changing, or, when appropriate, de-escalating treatment.Pro tip: If your vet finds a pocket of fluid on ultrasound, ask whether ultrasound-guided sampling is feasible. This increases the chance of growing the culprit bacteria and picking the right antibiotic first time.Are steroids or advanced compression ever appropriate?Short-term corticosteroids may be used in severe cases under veterinary supervision and always alongside aggressive antibiotics; automated compression/cryotherapy systems (e.g., Zamar) can be added over 34 days in stubborn cases to shift residual swelling. Both options are adjuncts, not replacements, for correct antimicrobial therapy and day-to-day management.On steroid use, Dr. Fogle cautions in Equus Magazine:Steroids are commonly used by veterinarians to address minor distal limb swellings, but we can run into trouble with steroids to treat severe cellulitis because they can effectively mask whether or not were successfully resolving the bacterial infection in the limb. Short-term steroid use with a bout of acute cellulitis is OK, but you wouldnt want to use it very long.In the UK, if conventional management (NSAIDs/antibiotics, cold therapy, compression, controlled movement) isnt clearing the oedema, clinicians sometimes add automated cold-compression systems. As noted by Horse & Hound, used several times daily for 34 days, these systems can help remove stubborn swelling and reduce recurrence risk. Access is improving via equine spas and therapy centres across the UK.What daily management speeds recovery and prevents recurrence?Cold therapy, firm compression bandaging, clean and dry limbs, and controlled in-hand walking are the day-to-day pillars that move fluid out and protect your horses lymphatics. Combine these with meticulous skin care and a dry environment to reduce the chance of future flare-ups.Build your daily plan around:Cold, then compress: Apply cold therapy (hose or ice) before re-bandaging to minimise post-bandage swelling. Our horse boots and bandages collection includes supportive stable wraps ideal for safe, even compression.Immaculate skin care: Gently clean legs to remove mud, clip if necessary for hygiene, and treat any nicks promptly with appropriate topical care. Stock up from our grooming and wound-care essentials so youre never caught short after a muddy turnout.Movement with safety: Short, frequent in-hand walks stimulate lymphatic flow. If youll be on lanes or low light, wear hivis for riders and consider a poll or breastplate light.Keep legs dry: In wet UK weather, balance turnout with protection. Use breathable turnout rugs that shed rain and mud, and switch to cosy stable rugs at night to avoid damp bedding wicking up the legs. Many owners trust brands like WeatherBeeta rugs for reliable waterproofing and fit.Support from within: Discuss targeted nutrition with your vet. Some horses benefit from hoof/skin support or immune-focused options browse our supplements for skin and recovery to plan ahead for winter.Quick tip: Bandage changes are a daily (sometimes twice daily) job. Always use thick padding under even, firm pressure. If youre unsure about technique, ask your vet or an experienced yard manager to check the first few applications.At Just Horse Riders, we recommend keeping a cellulitis kit ready through autumn/winter: clean stable wraps, cotton wool or leg pads, cohesive bandage, ice boots, thermometer, and a spare lead rope and hivis for safe in-hand exercise.What should I expect timeline, red flags, and when to escalate?With prompt, appropriate therapy many horses improve within 2448 hours; lack of progress, rising fever, or worsening lameness are red flags that warrant immediate re-evaluation by your vet. If swelling persists beyond a week, the risk of chronic limb enlargement increases and management must intensify.Your week-one roadmap:Day 0: Call your vet; start antimicrobials/NSAIDs; begin cold therapy and compression if advised.Day 12: Look for reduced heat, softening of oedema, a brighter horse, and a lower temperature. If not improving in this window, request culture/sensitivity sampling and consider ultrasound to guide treatment, as recommended by WestVETS. Many horses turn the corner by 2448 hours when treated aggressively, as noted by Ayr Equestrian.Day 34: Add imaging (ultrasound/rads) if swelling remains firm or lameness is severe; start serial SAA tests to quantify response (Horse & Hound).Day 57: Persistent swelling or fever? Escalate to referral options, discuss antibiotic change per culture, and consider advanced compression systems (e.g., Zamar) for 34 days of intensive sessions to move residual oedema.Red flags at any point include a temperature consistently over 38.6C, non-weight-bearing lameness, spreading or new areas of heat/swelling, purulent discharge or abscess formation, or any sign your horse is systemically unwell (off feed, colic signs). Immediate reassessment reduces the chance of chronic complications and aligns with BEVAs call for early, robust treatment over 510 days of NSAIDs/antibiotics plus physical therapies (BEVA).Remember, recurrence is most common in damp, muddy seasons and in horses that developed significant lymphatic scarring from previous bouts. Preventive skin care, dry stabling, and regular movement are your best defences heading into a UK winter.FAQsWhen should I request cultures for my horses cellulitis?Ask your vet to take bacterial culture and sensitivity samples before starting antibiotics whenever possible. If treatment has already begun and theres no clear improvement within 2448 hours, push for culture ideally from an ultrasound-identified fluid pocket to target the right antimicrobial and avoid delays (WestVETS).Is imaging needed if swelling persists?Yes. If the limb remains markedly swollen or very painful after the initial 2448 hours, request ultrasound to look for fluid pockets, tendon/ligament involvement, or cellulitis-related fasciitis. Radiographs can rule out bone or joint issues. Complex cases may need advanced imaging (CT/MRI) at a referral centre (WestVETS, Horse & Hound).When are steroids appropriate for cellulitis?Only in severe, carefully selected cases and always short term, under veterinary supervision, and alongside aggressive antibiotics. Steroids reduce swelling but can mask whether the infection is resolving, so they are not a first-line solution for most horses (Dr. Fogle, Equus).How long before I should see improvement, and what if I dont?Many horses respond within 2448 hours of starting appropriate therapy. If you dont see progress by then, re-evaluate promptly with cultures, imaging, and SAA blood tests to confirm your treatment is working and adjust if needed (Ayr Equestrian, Horse & Hound).Can exercise help during treatment, or should I keep my horse on box rest?Controlled in-hand walking is beneficial once your horse tolerates it, as movement drives lymphatic drainage. Start with short, frequent walks in safe footing and increase gradually. For roadside walking, wear hivis rider gear for safety.Whats the best bandage setup for cellulitis?Use thick, even padding from below the knee/hock to the fetlock and a firm, even stable bandage over the top. Change at least daily. Bandage both front or both hind limbs when possible to maintain symmetry. See our curated bandages and supportive wraps for options that create safe, consistent compression.How can I prevent recurrence at a UK livery yard?Keep legs clean and dry, treat skin breaks immediately, and maintain regular movement. Through wet months, choose breathable turnout rugs outdoors and suitable stable rugs inside to avoid damp legs. Stock quality wound care from our grooming collection and consider targeted supplements for skin and recovery support. Many UK owners also schedule proactive ice/compression sessions after muddy turnouts to head off flare-ups.Cellulitis is beatable but only if you move fast. With BEVA-aligned treatment (510 days of NSAIDs/antibiotics), diligent cold-and-compression care, and smart UK yard management, most horses turn the corner within 48 hours and return to comfortable work. If progress stalls, escalate early with cultures, imaging, and objective SAA monitoring. Our team at Just Horse Riders is here to help you kit out the essentials so you can act the moment you spot that first hot, swollen leg. Shop the Essentials Everything mentioned in this guide, ready to browse. Shop Boots & BandagesShop Grooming KitShop Turnout RugsShop Stable RugsShop Hi-Vis Gear