PRP for Joint Pain: How Platelet-Rich Plasma Injections Help Knees, Hips, and Shoulders

Reviewed by the physician team at PURE Regenerative Medicine | West Lafayette, IN

If you are managing chronic joint pain in your knee, hip, shoulder, or another area, you have likely been told that your options are physical therapy, cortisone injections, or, eventually, surgery. For many patients, none of those options feel adequate: physical therapy helps but has limits, cortisone provides temporary relief while potentially accelerating joint degeneration over time, and surgery carries risks and recovery demands that not everyone is ready for.

Platelet-rich plasma, or PRP, offers a fourth path. It is a regenerative injection therapy that uses concentrated growth factors from your own blood to stimulate the body's natural healing response in damaged or inflamed joint tissue. It is not a pain mask. It is not a steroid. It is a biologically active treatment designed to address the underlying tissue damage that is causing the pain.

At PURE Regenerative Medicine in West Lafayette, Indiana, our board-certified ER physicians Dr. Marc Estes and Dr. Rickin Shah bring a clinical depth to regenerative medicine that is rarely available in a non-surgical setting. Here is what you need to know about PRP for joint pain.

What Is PRP and How Does It Work?

Platelet-rich plasma is derived from your own blood through a process called centrifugation. A small sample of blood is drawn and placed in a centrifuge that spins it at high speed, separating the components by density. The result is a concentrated layer of platelets, up to 5 to 10 times the normal concentration found in whole blood, suspended in plasma.

Platelets are best known for their role in clotting, but they are also the primary delivery vehicle for growth factors, signaling proteins that orchestrate tissue repair and regeneration. When injected into a damaged joint or tendon, these growth factors stimulate several biological processes:

• Recruitment of stem cells and repair cells to the injury site
• Stimulation of collagen synthesis to rebuild damaged cartilage and connective tissue
• Modulation of the local inflammatory environment to reduce chronic inflammation without suppressing the healing response
• Promotion of angiogenesis, the formation of new blood vessels that bring oxygen and nutrients to healing tissue

The key distinction between PRP and cortisone is mechanism. Cortisone is an anti-inflammatory that reduces pain by suppressing the immune response in the joint. PRP works with the immune response, channeling it toward active repair rather than chronic inflammation. Over a series of treatments, PRP can produce structural improvements in the joint tissue that cortisone cannot.

What Joint Conditions Does PRP Treat?

PRP has been studied across a range of musculoskeletal conditions, with the strongest clinical evidence in the following areas:

Knee Osteoarthritis

Knee osteoarthritis is the most extensively researched application for PRP in joint medicine. Multiple randomized controlled trials have shown that PRP injections produce greater pain relief and functional improvement than hyaluronic acid injections and, in many cases, than cortisone over a 6 to 12 month follow-up period. PRP is particularly well-suited for mild to moderate knee OA, where cartilage loss has not yet progressed to bone-on-bone contact.

Shoulder Pain and Rotator Cuff Pathology

PRP is used for rotator cuff tendinopathy, partial tears, and subacromial impingement syndrome. Clinical studies support meaningful improvements in pain and function, particularly for patients with chronic shoulder pain that has not responded adequately to physical therapy or cortisone.

Hip Osteoarthritis and Labral Irritation

Hip OA and labral pathology are increasingly being treated with PRP as an alternative to corticosteroid injections, which have documented concerns related to femoral head integrity with repeated use. PRP provides pain modulation without the structural concerns associated with steroid injections in the hip.

Tennis Elbow and Golfer's Elbow

Lateral and medial epicondylitis (tennis and golfer's elbow) represent some of the strongest evidence bases for PRP in tendinopathy. Multiple high-quality trials have demonstrated superior long-term outcomes with PRP compared to cortisone, with effects that persist beyond 12 months in many patients.

Plantar Fasciitis

Chronic plantar fasciitis that has failed conservative management, including stretching, orthotics, and physical therapy, responds meaningfully to PRP. The growth factors target the degenerative changes in the plantar fascia tissue that underlie chronic heel pain.

PRP vs. Cortisone: An Honest Comparison

Cortisone injections have been the default joint pain treatment for decades, and for good reason: they work quickly and reliably reduce inflammation. But the tradeoffs are real and often not fully communicated to patients.

• Duration: Cortisone typically provides 4 to 12 weeks of relief. PRP effects develop more slowly but tend to persist for 6 to 18 months in good responders
• Tissue effects: Repeated cortisone injections are associated with cartilage thinning, tendon weakening, and potential deterioration of joint structures over time. PRP is thought to be tissue-preserving
• Mechanism: Cortisone suppresses inflammation broadly. PRP modulates the inflammatory environment while actively promoting repair
• Sessions needed: Cortisone is typically a single injection per episode. PRP usually requires a series of 2 to 3 injections spaced 4 to 6 weeks apart for optimal results

For patients who need rapid short-term relief before an important event, cortisone remains a reasonable option. For patients seeking a treatment that may improve the underlying condition rather than mask it, PRP is worth serious consideration.

What to Expect at PURE: The PRP Joint Injection Process

At PURE Regenerative Medicine, all PRP treatments are guided by our physician team and delivered by trained medical providers. This matters clinically: PRP injection precision directly affects outcomes, particularly for joints like the hip or shoulder where landmark-guided or ultrasound-guided placement is important.

Step 1: Consultation and Evaluation

Your provider reviews your pain history, imaging results when available, and prior treatments to determine whether PRP is appropriate for your specific condition. Not all joint pain is the same, and not every patient is an ideal PRP candidate. Dr. Estes and Dr. Shah use their clinical judgment to set realistic expectations and identify the right protocol.

Step 2: Blood Draw and Preparation

A small amount of blood, typically 30 to 60mL, is drawn from your arm. The sample is placed in a centrifuge and spun to isolate the platelet-rich plasma layer. The entire preparation takes approximately 15 to 20 minutes.

Step 3: Injection

The target area is cleaned and, when appropriate, a local anesthetic is applied for comfort. The PRP is injected directly into the affected joint or tendon. The procedure typically takes 5 to 15 minutes depending on the site being treated.

Step 4: Recovery and Protocol

Most patients experience mild soreness and swelling at the injection site for 2 to 5 days as the body initiates its healing response. Anti-inflammatory medications including NSAIDs like ibuprofen should be avoided for 1 to 2 weeks post-injection, as they can interfere with the PRP mechanism. Light activity is generally appropriate within a few days, with progressive return to full activity based on comfort.

Most patients undergo 2 to 3 sessions spaced 4 to 6 weeks apart for optimal outcomes, though some conditions respond well to a single injection.

Who Is a Good Candidate for PRP Joint Injections?

PRP is most appropriate for:

• Adults with mild to moderate joint osteoarthritis who have not responded adequately to physical therapy or NSAIDs
• Patients with tendinopathy (elbow, shoulder, Achilles, patellar) who want an alternative to cortisone
• Patients who have had multiple cortisone injections and are concerned about their long-term joint effects
• Patients who want to avoid or delay joint replacement surgery
• Patients without active joint infection, certain blood disorders, or cancer affecting the treatment area

PRP is generally not the first-line option for acute injuries requiring immediate immobilization, end-stage arthritis with bone-on-bone contact, or patients on anticoagulation therapy without physician clearance. The consultation process at PURE ensures you receive an honest assessment of whether PRP is genuinely the right fit for your condition.

Ready to Explore PRP for Joint Pain?

Schedule a consultation at PURE Regenerative Medicine in West Lafayette, IN. Our ER physician team will evaluate your joint health and determine whether PRP is the right approach for your condition. Serving patients throughout Lafayette, Tippecanoe County, and the greater West Lafayette area including Purdue University community.

Book Your PRP Consultation at PURE Regenerative Medicine .

Frequently Asked Questions: PRP for Joint Pain

How long does PRP take to work for joint pain?

PRP produces a biological response rather than a pharmacological one, which means results develop gradually over weeks to months rather than hours. Most patients notice initial improvement at 4 to 6 weeks following their first or second injection, with the most significant pain relief and functional improvement typically occurring at 3 to 6 months. This slower onset compared to cortisone reflects the fact that PRP is remodeling tissue, not simply blocking inflammation.

How many PRP injections are needed for knee pain?

Most protocols for knee osteoarthritis involve a series of 2 to 3 injections spaced 4 to 6 weeks apart. Some patients see meaningful improvement after a single injection, while others with more advanced disease may benefit from 3 sessions. Your provider at PURE will recommend a protocol based on the severity of your condition and your response to initial treatment.

Is PRP covered by insurance?

PRP for musculoskeletal conditions is not currently covered by most insurance plans in the United States, as it is still considered experimental or investigational by many payers despite a growing body of clinical evidence supporting its efficacy. The out-of-pocket cost varies by practice and number of injections. Please contact PURE for current pricing.

Does PRP actually regenerate cartilage?

The evidence on cartilage regeneration from PRP is evolving. Current research suggests that PRP can slow cartilage degeneration, reduce the inflammatory environment that accelerates cartilage breakdown, and support the health of the remaining cartilage. Whether it truly regrows lost cartilage in significant amounts is less clear. The more established benefit is pain reduction and functional improvement, which for most patients is the primary goal.

Can PRP replace knee replacement surgery?

For some patients with mild to moderate knee OA, PRP can provide meaningful relief and potentially delay the need for surgery by years. It is not a cure for advanced arthritis and cannot replace a joint that has reached end-stage deterioration. However, it is a genuine option for patients who are not yet at the point of surgical necessity and want to explore conservative alternatives first.

Does PURE offer PRP joint injections in West Lafayette?

Yes. PRP joint and musculoskeletal injections are available at PURE Regenerative Medicine in West Lafayette, IN, guided by our board-certified physicians and delivered by our trained medical providers. We serve patients throughout Tippecanoe County, including Lafayette, West Lafayette, and surrounding communities. 

Medical Disclaimer: This article is for informational purposes only and does not constitute medical advice. Individual results vary. Please consult with a qualified healthcare provider before beginning any treatment.