Tendonitis in horses is a condition which relates to the horses tendons and should not be mistaken for a specific DDFT tendon injury.
In many cases tendonitis in horses is actually created by an initial trauma or strain to the tendon when the horse is exercising, known as intrinsic tendonitis. Tendonitis as a condition then develops over a period of time and is often referred to as 'a repetitive strain injury' created through bruising or penetration, known as extrinsic tendonitis.
Tendonitis is thought to develop from overworking the horse regularly on uneven ground and is more commonly found with active horses. It only takes one bad step!
In this article we look at the symptoms of horse tendonitis, the most common causes of the condition and various treatments available to you if your horse is diagnosed with tendonitis.
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Spotting the First Signs of a Tendon Strain
As with many long term degenerative conditions (such as equine arthritis) spotting the condition early is often the best way to manage the condition and avoid further complications.
A sports horse with tendonitis is likely to result in them being retired as the tendon is unlikely to fully heal and will effect the overall mobility and performance of the horse.
Symptoms of Tendonitis
The most obvious symptom of your horse developing tendonitis is lameness, either severe or intermittently. The level of the horses lameness directly associates to how much inflammation is within the damaged tendon.
As with any lame horse, they will likely show signs of fatigue. A horse with chronic tendonitis may go sound while walking or trotting but lameness will return under hard work. Your horses levels of fatigue are often an early indicator.
Swelling or inflammation around the area of the tendon will sometimes cause a large lump running down one or both sides of the tendon, often effecting the digital flexor tendons and lead to varying levels of pain.
Your horse will probably be tender to touch in the effected area and not bear their full weight on the effected leg.
In the majority of cases tendonitis is found in the forelimbs rather than the hind limbs.
Bowed tendon, a serious condition for an active sports horse, is a serious and severe version of tendonitis and requires immediate medical attention. A race horse or jumping horse with bowed tendons is likely to never compete again.
Tendonitis is best treated in the early, acute stages so catching the condition early and providing the correct diagnosis and treatment plan will be key to a full recovery.
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Diagnosis of Tendonitis
Establishing that your horse has developed a tendon injury is one thing. Understanding whether your horse is developing tendonitis is another - both require immediate medical diagnosis.
Using ultrasound technology to diagnose the extend of the soft tissue injury is now widely used and is carried out around 5 to 7 days after the injury occurred. Whilst waiting for this many owners now adopt a variety of complementary techniques to support the horses pain levels and provide anti inflammatory support.
Although not cheap, normally between £250 and £300, Ultrasound technology does provide accurate diagnosis of the damage and is also used throughout the recovery process the establish how the tendon is healing. Many vets now use mobile ultrasound technology and will bring the imaging technology to your yard.
Thermal imaging techniques can also be a useful diagnosis tool as the image can show the exact location of the inquiry and where it’s effecting the horse.
Once the vet has diagnosed the condition treatment can begin.
Treatment of Tendonitis
First and foremost, your horse must rest.
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During the acute stage, within the first 3 days of the injury occurring, many provide complementary support and medication to help reduce any inflammation.
NSAID anti inflammatory medication is commonly administered to help with inflammation levels. In many sports horses this is not possible and many now look for more natural approaches than NSAID medication. It remains an important part of treating horse with tendonitis and particularly within the acute stages.
Advancements in magnetic therapy introduce ‘resonance technology’ to the equine tack market; unlike traditional magnetic therapy this advanced form of therapy does not lead to an increase in heat and thus is suitable for horses with tendon swelling. Advanced magnetism can be used long term and can be fitted to the horses legs immediately after the injury with a view to reducing inflammation and pain levels. Endorsed by many professional yards and vets across the world, advanced magnetism is now widely used as a preventative measure as well as a treatment aid.
Cold therapy such ice-boots, compress-bandaging and cold-hosing are also common treatments in supporting a reduction in inflammation and thus pain levels.
Various medications are available which can be injected directly into the injured tendon including hyaluronic acid and even organic compounds and in some more sever cases operations to cut the tendon has proven effective.
More recently, stem cell therapy and platelet rich plasma therapy are being spoken about with particular interest. Tendons are unable to regenerate new fibres after a trauma and in many cases will heal through the development of scar tissue. Scar tissue is more prone to re injury so the use of stem cells to target the damaged tendon can keep your horse sound moving forward. Be wary though, stem cell therapy is incredibly expensive as the vet must first sedate the horse and collect the cells using specialised equipment.
Recovery of Tendonitis in Horses
Once your hours has been diagnosed a rest and rehabilitation program will be created. This is aimed at ensuring the most optimum recovery processes and time period to ensure the horse has the best possible chance of a full recovery.
In the majority of cases, the initial treatment following the injury will be for 10-14 days. Within this period the horse will require full box rest and have regular cold therapy to support any inflammation. Many will administer ongoing anti inflammatory pain relief throughout this first healing stage and look towards complementary and alternative therapies to keep their horse comfortable and pain free. Remember, the main purpose of this first 10-14 day recovery process is to provide pain relief for your horse.
Creating a Tendonitis Recovery Plan
Following a bout of treatment above, stage 2 of the horses recovery process will be to support the horses regeneration. This second stage of healing will take place as the cells begin to regenerate and will normally take another 10-14 days. The horse should remain on box rest throughout this second stage of healing.
Once the horse has begun to strengthen the fibres within the tendon, stage 3 of the healing process will begin, normally between 21-30 days after the injury. This period of recovery can take up to 12 months and during this time the fibres within the tendon will begin to rearrange themselves into normal patterns. Within this period of recovery the horse will require regular and controlled light exercise work and several vet inspections.
Controlled exercise is a vital aspect of recovery following tendonitis. Your vet will provide you an individual plan to help your horse which will likely start with hand-walking whilst on box rest with gradual increases over a period of 6-9 months.
The over all fitness of your horse will be carefully managed to ensure that re injury or further complications do not develop over time
Ultrasound and thermal imaging techniques can provide valuable insight into the horses recovery stage and provide an educated recommendation as to whether to introduce trot work and more steady canter exercises.
Using Advanced Magnetism for Tendon Support
When managing tendonitis, controlling heat is vital. Unlike traditional static magnets that can increase localised temperature, EQU StreamZ uses unique 360º resonance technology to support the horse's natural recovery process without generating heat. This makes our bands a safe, non-invasive option for 24/7 use—even during the acute stage of inflammation. Trusted by vets and professional yards worldwide, they provide the continuous support needed to keep your horse comfortable throughout the long rehabilitation period.
Whatever the situation, having a horse with tendonitis is a medical emergency and requires the support of a medical professional.
Conclusion
Tendonitis — inflammation of a tendon — is one of the most common soft tissue issues seen in horses and can impact movement, performance, and long‑term soundness if not recognised and managed appropriately. Whether the condition arises from sudden overload, repetitive strain, uneven footing, or training progression that exceeds the horse’s current conditioning, early detection and intervention are key to successful outcomes.
Understanding the symptoms, such as heat, swelling, and sensitivity in the affected area, empowers you to act promptly. A comprehensive treatment plan that includes rest, controlled rehabilitation, veterinary‑guided therapies, and ongoing monitoring gives your horse the best chance of recovery — while structured prevention strategies help reduce the risk of recurrence.
Successful management of tendonitis isn’t just about addressing the immediate injury. It involves adjusting workload, refining daily routines, and maintaining balanced conditioning over time. With vigilance, thoughtful care, and appropriate rehab support, many horses recover well from tendonitis and go on to enjoy sound, active lives.
👉 Articles of interest:
If your horse is recovering from injury, read our complete guide to Rehabilitation & Recovery for Equine Injuries (Repair).
Prevention is as important as cure. With this in mind, read our guide to How to Prevent Injuries in Horses (Prevent).
To go beyond prevention and optimise long-term soundness, explore Optimising Performance in Horses (Perfect).
Frequently Asked Questions
What is tendonitis in horses?
Tendonitis is the inflammation of a tendon, typically caused by overuse, strain, or injury. It commonly affects the superficial digital flexor tendon in the forelimbs but can occur in other tendons as well.
What are the common signs of tendonitis in horses?
Signs include heat, swelling, pain or sensitivity in the tendon, lameness, stiffness, and changes in movement or performance. Early detection is essential to prevent further damage.
What causes tendonitis in horses?
Tendonitis can result from sudden overload, repetitive strain, poor footing, improper conditioning, uneven training surfaces, or insufficient warm-up and cool-down routines.
How is tendonitis diagnosed in horses?
Veterinarians diagnose tendonitis through physical examination, palpation, lameness assessment, and imaging techniques such as ultrasound to evaluate tendon fiber damage and severity.
What treatments are used for tendonitis?
Treatment typically includes rest, controlled exercise or rehabilitation, cold therapy, anti-inflammatory medications, supportive bandaging, and sometimes regenerative therapies like stem cell or PRP injections.
Can horses fully recover from tendonitis?
With early intervention, proper management, and structured rehabilitation, many horses can recover and return to their previous level of activity. Ongoing care and gradual workload increases help prevent re-injury.
How can tendonitis be prevented?
Prevention strategies include consistent warm-up and cool-down routines, gradual training progression, proper footing, regular conditioning, and monitoring for early signs of strain. Supporting tendon health through recovery tools, such as cooling boots, can also reduce risk.
Why is EQU StreamZ safe for a horse with a "bowed" tendon?
Traditional magnetic therapy often relies on pulsing magnets that can generate heat, which is the last thing an inflamed or "bowed" tendon needs. EQU StreamZ uses unique 360º resonance technology that provides non-invasive support without increasing the temperature of the leg. This makes it a safe, natural option to support your horse’s recovery from the very first day of injury, even during the acute stage of inflammation.
Can magnetic horse bands be worn 24/7 during box rest?
Yes, EQU StreamZ bands are designed for continuous 24/7 use, which is ideal for horses on long-term box rest due to tendonitis. Because the technology doesn't rely on static magnets that trap heat, you can "fit and forget" them. This ensures your horse receives constant support for their natural healing process and overall mobility, whether they are standing in the stable or starting their hand-walking program.
How do EQU StreamZ therapy bands support long-term tendon health?
Recovery from tendonitis is a long process, often taking 6 to 12 months. EQU StreamZ therapy bands help support the body's natural systems over the long haul without the use of drugs or invasive treatments. By providing a consistent, 360º effect, they help keep the horse comfortable and supple as the tendon fibres begin to rearrange and strengthen during their rehabilitation.