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Tendon injuries have a frustrating habit of coming back. You rest, you feel better, you return to activity, and then the same ache flares up again. This cycle is especially common with tendons because they heal slowly and often don’t receive enough blood flow to repair themselves fully. For people stuck in this pattern, platelet-rich plasma therapy (PRP therapy) has become a popular option worth understanding.
Why Tendons Keep Flaring Up
Tendons connect muscle to bone, and they take on a lot of repetitive stress during everyday movement and exercise. Unlike muscles, tendons have limited blood supply, which means they don’t get the same steady delivery of oxygen and nutrients needed for quick repair. When a tendon is overused or injured, tiny tears can form in the tissue. If given proper rest, these tears can heal. But if the area is reinjured before it fully recovers, the tendon never gets the chance to rebuild strong, healthy tissue.
This is why conditions like tennis elbow, Achilles tendinitis, and rotator cuff tendinopathy tend to linger for months or even years. Painkillers and rest might calm the symptoms temporarily, but they don’t always address the underlying issue: tissue that hasn’t properly healed.
What Is PRP Therapy?
Platelet-rich plasma therapy uses a concentrated form of a patient’s own blood to encourage healing in damaged tissue. The process starts with a blood draw, similar to what you’d experience during a routine lab test. That blood is then placed in a centrifuge, a machine that spins at high speed to separate its components. This separation isolates the platelets, which are small cell fragments known for their role in clotting and healing.
The resulting platelet-rich plasma is injected directly into the site of the tendon injury. Platelets contain growth factors, which are proteins that signal the body to repair tissue, generate new cells, and reduce inflammation. By delivering a concentrated dose of these growth factors right where the damage is, PRP therapy aims to jumpstart the body’s natural healing response in an area that might otherwise struggle to repair itself.
Why PRP Makes Sense for Chronic Tendon Issues
Tendons that have been injured repeatedly often develop a condition called tendinopathy, in which the tissue becomes thickened, disorganized, and weakened over time rather than inflamed in the classic sense. Because tendinopathy involves degeneration rather than acute inflammation, treatments that simply reduce swelling, like ice or anti-inflammatory medication, don’t always address the real problem.
PRP therapy takes a different approach by targeting the root cause of the issue: poor tissue quality. The growth factors delivered through the injection are intended to encourage the body to form new, healthier collagen fibers in the damaged area. For tendons that have been stuck in a flare-up cycle, this regenerative approach offers a way to address the underlying tissue damage rather than just masking the pain.
What the Treatment Process Looks Like
A typical PRP session for a tendon injury begins with an evaluation from a healthcare provider, often including imaging like an ultrasound to pinpoint the exact location and extent of the damage. On the day of treatment, blood is drawn and processed in the centrifuge, which usually takes around fifteen minutes. The provider then uses imaging guidance to inject the plasma precisely into the affected tendon tissue.
After the injection, it’s common to experience some soreness or stiffness in the area for a few days. Many providers recommend a brief period of rest followed by a gradual return to movement, often guided by a physical therapist to make sure the tendon is loaded appropriately as it heals. Because PRP works with the body’s own healing processes, results aren’t usually immediate. Patients often notice gradual improvement over the following weeks and months as the tissue rebuilds.
Who Might Be a Good Candidate
PRP therapy tends to be considered for people who have tried more conservative treatments, like rest, physical therapy, or anti-inflammatory medications, without lasting relief. It’s often discussed for chronic tendon conditions affecting the elbow, shoulder, knee, Achilles tendon, or hip. Because the procedure uses a patient’s own blood, the risk of allergic reaction or rejection is low, which makes it an appealing option for those looking to avoid more invasive interventions like surgery.
That said, PRP isn’t a guaranteed fix for every tendon problem, and it works best as part of a broader treatment plan that includes proper rehabilitation and activity modification. Anyone dealing with a tendon injury that keeps flaring up should talk with a sports medicine specialist or orthopedic provider to determine whether PRP therapy fits their specific situation and recovery goals.
