PRP Therapy: A Biologic Approach to Healing Tendons and Arthritic Joints
When you’re dealing with a stubborn tendon injury or a knee that aches with every step, the standard medical playbook often offers limited options: rest, anti-inflammatory medications, physical therapy, or corticosteroid injections. If those fail, the next stop is often surgery. But there is a growing middle ground: a regenerative treatment that uses nothing more than a concentrated portion of your own blood to kickstart your body’s natural healing machinery. That treatment is platelet-rich plasma (PRP).
What Exactly Is PRP?
Platelet-rich plasma is exactly what it sounds like: blood plasma with a higher-than-normal concentration of platelets. To create PRP, a clinician draws a small amount of the patient’s blood, typically from an arm vein, and places it into a specialized centrifuge. The centrifuge spins the blood at high speed, separating it into layers based on density. The result is a concentrated solution of platelets, which are then re-injected directly into the site of injury.
Why platelets? Because these tiny blood cells are far more than just clotting agents. Platelets are packed with growth factors, cytokines, and signaling proteins—molecular messengers that play an essential role in tissue repair, collagen remodeling, inflammation regulation, and recovery after injury. By delivering these concentrated healing factors directly to a damaged tendon or arthritic joint, PRP aims to amplify the body’s own repair response.
PRP vs. Cortisone: A Fundamental Difference in Philosophy
To understand why PRP has gained so much attention, it helps to compare it to the most common alternative: corticosteroid injections.
Cortisone works by broadly suppressing inflammation. For acute flare-ups, that can provide rapid pain relief. However, repeated cortisone injections come with significant downsides. Studies have shown that corticosteroids may weaken tendon structure over time, increase the risk of tendon rupture, and accelerate cartilage loss in joints. They treat the symptom—inflammation—without addressing the underlying tissue quality.
PRP takes the opposite approach. Rather than suppressing inflammation, PRP is designed to support the body’s natural repair process. It doesn’t just mask pain; it creates a biological environment conducive to healing. This makes PRP especially attractive for tendon-related conditions where tissue quality, collagen health, and long-term function matter most.
Common Applications of PRP Therapy
PRP is not a cure-all, but it has shown particular promise in two main categories: chronic tendon injuries and degenerative joint arthritis.
1. Achilles Tendinopathy
The Achilles tendon is the largest and strongest tendon in the human body, but it is also notoriously slow to heal. Achilles tendinopathy is characterized by pain, thickening, and degeneration of the tendon and often develops over months or years of overuse. Because the tendon has naturally poor blood flow, it struggles to mount an effective healing response.
PRP may help change that. By injecting concentrated platelets directly into the degenerated tendon, clinicians can introduce a fresh wave of growth factors that stimulate a healthier healing environment. The evidence suggests that when PRP is combined with a structured rehabilitation program, patients often experience meaningful reductions in pain, improved collagen remodeling, and a better ability to tolerate progressive loading over time.
2. Elbow Tendinopathy (Tennis Elbow & Golfer’s Elbow)
Lateral epicondylitis, better known as tennis elbow, is one of the most common tendinopathies seen in clinical practice. Despite the name, it frequently affects people who have never picked up a racket—any repetitive gripping or wrist extension can trigger it.
For years, tennis elbow was treated as an inflammatory condition, hence the "-itis" suffix. But modern research has revealed that chronic tennis elbow is not simply inflamed; it is a degenerative tendon condition involving disorganized collagen, abnormal blood vessels, and impaired healing capacity. This explains why rest and anti-inflammatories often provide only temporary relief.
PRP directly targets this underlying biology. By delivering concentrated healing factors to the damaged tendon origin, PRP can help stimulate new collagen production, reduce pain, and improve grip strength. It is most frequently used when symptoms persist despite rest, bracing, physical therapy, or activity modification—often becoming a viable alternative to surgery.
3. Knee Arthritis
Osteoarthritis of the knee is one of the leading causes of chronic pain and disability worldwide. For patients with mild to moderate arthritis who are not ready for knee replacement, options have historically been limited to physical therapy, weight loss, oral medications, and hyaluronic acid injections.
PRP has emerged as one of the most widely studied and used biologic options for knee arthritis. Research suggests that PRP may help reduce inflammatory signaling within the joint, improve comfort, and support better mobility. Patients often report less morning stiffness, less pain with weight-bearing activities, and a higher quality of life.
It is important to set realistic expectations: PRP does not replace lost cartilage or reverse advanced arthritis. However, for patients trying to stay active, delay surgery, or avoid long-term reliance on pain medications, PRP can be a valuable intermediate option.
4. Shoulder Arthritis
The shoulder is another common site of degenerative arthritis, particularly in older adults or those with a history of rotator cuff tears or shoulder injuries. Shoulder arthritis can make everyday activities—reaching for a cup, putting on a shirt, or sleeping on the affected side—surprisingly difficult.
PRP may also be used in shoulder arthritis, especially for patients who want to avoid or postpone joint replacement surgery. When performed with image-guided injection techniques (such as ultrasound or fluoroscopy), PRP can be placed with precision directly into the arthritic joint or surrounding soft-tissue structures. This targeted delivery helps maximize the concentration of healing factors where they are needed most, potentially reducing pain and improving functional range of motion.
What to Expect From PRP Treatment
If you and your clinician decide that PRP is appropriate for your condition, here is what a typical course of treatment looks like:
Initial evaluation: Your clinician will review your medical history, perform a physical examination, and obtain appropriate imaging (usually ultrasound or MRI) to confirm the diagnosis and rule out other causes of pain.
Blood draw and preparation: On the day of the procedure, a small amount of blood is drawn from your arm. The blood is processed in a centrifuge for approximately 15–20 minutes to isolate the platelet-rich plasma.
Injection: The PRP is then injected directly into the target area. For tendons, the injection is often placed within the substance of the damaged tendon. For arthritic joints, it is injected into the joint space. Your clinician may use ultrasound guidance to ensure precise placement.
Post-procedure care: You may experience some soreness or increased pain for a few days after the injection—this is actually a sign that the healing response has been activated. Most patients are advised to avoid anti-inflammatory medications (NSAIDs) during this period, as they can interfere with the PRP mechanism.
Rehabilitation: PRP is not a standalone treatment. Best results are consistently seen when PRP is combined with a guided rehabilitation plan that includes activity modification, strengthening exercises, and gradual return to normal function.
Is PRP Right for You?
PRP is not for everyone. It is generally not recommended for patients with active infections, certain blood disorders, or those taking blood-thinning medications that cannot be safely paused. It also has limited evidence for severe, bone-on-bone arthritis where joint replacement may be the more appropriate long-term solution.
However, for the right patient PRP offers a biologically focused, low-risk treatment option. This could be someone with a chronic tendon injury that has not responded to conservative care, or a person with mild to moderate knee or shoulder arthritis looking to stay active and delay surgery. It uses your body’s own healing machinery rather than introducing foreign substances or simply masking pain.
The Bottom Line
PRP represents a shift in how we think about musculoskeletal healing. Rather than suppressing inflammation, it supports repair. Rather than weakening tissue, it aims to strengthen it. Rather than temporary relief, it targets longer-term function.
The best outcomes are not accidental. They come from proper diagnosis, careful patient selection, skilled injection technique (often image-guided), and a commitment to rehabilitation. If you are struggling with an Achilles tendinopathy, tennis elbow, arthritic knee, or painful shoulder, PRP may be the option you haven’t yet explored—one that works with your biology, not against it.
Interested in learning whether PRP is right for your specific condition? A thorough evaluation, including imaging and a discussion of your goals, is the first step toward a personalized treatment plan.
Contact Total T Clinic today and start your path to a more pain-free life!