# Research can help you ask better shoulder questions *What may help shoulder soreness | shoulder regeneration scottsdale* > A shoulder regeneration Scottsdale guide to what PRP research says about soreness, movement, scans, cost, and time. ## PRP doesn't help every kind of shoulder soreness Does platelet-rich plasma, called PRP, help every sore shoulder? No. A clinic draws blood, spins it, and keeps liquid holding extra platelets for the PRP treatment. An ache around those four shoulder muscles and tendons differs from a sudden tear or worn joint. ## Research on PRP for worn shoulder tendons is mixed Some research compares PRP with cortisone medicine for soreness around these tendons. Some people report later relief with sleeping or reaching. Other research finds little difference that a person would notice. I'd ask whether the people studied had the same tendon problem found in your exam. PRP also differs between clinics because some mixes keep more white blood cells. Other mixes remove most of those cells or hold a different amount of platelets. That means one clinic's research won't fit every PRP treatment. Ask what mix is offered, what side effects were reported, and how often people felt enough relief to matter. ## Less soreness can matter even when a scan looks the same A shoulder can feel better while a scan still shows worn tissue. It'll sometimes look worn on a scan without hurting during normal use. If a clinic says new tendon tissue grew, ask to compare scans from before and after care. A smaller tear or thicker tendon would be different from soreness alone. Before a visit, track sleep, reaching, lifting, and golf for a while. You'll have clear daily tasks to compare after care begins. If gentle exercise helps, count that as real progress too. QC Kinetix provides shoulder exams and discusses non-surgical regenerative treatment options, including PRP made there from a blood draw. ## Sources 1. FDA states plainly that no stem cell, exosome, stromal vascular fraction, umbilical cord blood, Wharton's jelly or amniotic-fluid product has been approved for the treatment of ANY orthopedic condition - it names osteoarthritis, tendonitis, disc disease, tennis elbow, back pain, hip pain, knee pain, neck pain and shoulder pain individually. The only FDA-approved stem cell products in the United States are cord-blood-derived blood-forming stem cells for disorders of the hematopoietic system, and there are currently no FDA-approved exosome products. US Food and Drug Administration, Center for Biologics Evaluation and Research — [Consumer Alert on Regenerative Medicine Products Including Stem Cells and Exosomes](https://www.fda.gov/vaccines-blood-biologics/consumers-biologics/consumer-alert-regenerative-medicine-products-including-stem-cells-and-exosomes). *FDA*, 2020. 2. The RESTORE trial - a participant-, injector- and assessor-blinded RCT of 288 adults aged 50+ with symptomatic medial knee OA (Kellgren-Lawrence 2-3) - compared three weekly intra-articular PRP injections against saline placebo, with co-primary endpoints of 12-month knee pain and medial tibial cartilage volume on MRI. PRP did not beat placebo on either. It is the single best-designed test of the specific claim that PRP changes joint structure, and it was negative. Bennell KL, et al. — [Effect of Intra-articular Platelet-Rich Plasma vs Placebo Injection on Pain and Medial Tibial Cartilage Volume in Patients With Knee Osteoarthritis: The RESTORE Randomized Clinical Trial.](https://pubmed.ncbi.nlm.nih.gov/34812863/). *JAMA*, 2021. DOI: 10.1001/jama.2021.19415. 3. A 2026 systematic review and meta-analysis of 28 randomized trials of intra-articular mesenchymal stem cell-based therapies in knee OA found significant improvements in several pain and function measures (delta-VAS MD -1.67; KOOS pain MD 15.37) but NO significant difference in WOMAC, KOOS quality of life or the Lequesne index, and MRI-based WORMS scores were non-significant - indicating no consistent structural benefit. Its own conclusion: these therapies serve a primarily SYMPTOM-modifying rather than STRUCTURE-modifying role, with higher frequencies of local reactions to weigh against the symptomatic benefit. Awad G, et al. — [Efficacy and safety of intra-articular mesenchymal stem cell-based therapies in knee osteoarthritis: A systematic review and meta-analysis of randomized controlled trials.](https://pubmed.ncbi.nlm.nih.gov/41863718/). *Clinical rheumatology*, 2026. DOI: 10.1007/s10067-026-08042-w. 4. The August 2025 AAOS Evidence-Based Clinical Practice Guideline on Management of Rotator Cuff Injuries issued 25 recommendations and 4 consensus statements. Among its updates it clearly RESTRICTS the use of platelet-rich plasma and marrow stimulation in rotator cuff repair, limits prolotherapy in full-thickness tears, establishes CT as an adjunctive imaging modality, and endorses early mobilization after repair of small-to-medium tears. Ye Y, et al. — [[Interpretation of the 2025 American Academy of Orthopaedic Surgeons (AAOS) on Management of Rotator Cuff Injuries Evidence-Based Clinical Practice Guideline].](https://pubmed.ncbi.nlm.nih.gov/41730726/). *Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi*, 2026. DOI: 10.7507/1002-1892.202511084. 5. A 2026 meta-analysis of 10 randomized trials (n=591) found PRP and corticosteroid indistinguishable at 3-6 weeks and 3 months, with PRP pulling ahead at 6 months: ASES +10.8 (95% CI 4.71-16.80), Constant-Murley +10.7 (1.21-20.27) and VAS pain -0.8 (-1.45 to -0.18), plus fewer adverse events (RR 0.66, 0.44-0.99). The authors describe the benefit as statistically significant but CLINICALLY MODEST. Yuwarungsikul C, et al. — [Platelet-rich plasma provides modest but durable functional benefit over corticosteroid for rotator cuff tendinopathy: A systematic review and meta-analysis of randomized controlled trials.](https://pubmed.ncbi.nlm.nih.gov/42021740/). *Knee Surg Sports Traumatol Arthrosc*, 2026. DOI: 10.1002/ksa.70416. 6. A meta-analysis of nine randomized trials (469 patients) found corticosteroid superior to PRP in the SHORT term on Constant, Simple Shoulder Test and ASES scores, no difference at mid-term, and PRP superior in the LONG term on Simple Shoulder Test and ASES. The authors state explicitly that none of these differences reached the minimal clinically important difference. Peng Y, et al. — [Comparison of the effects of platelet-rich plasma and corticosteroid injection in rotator cuff disease treatment: a systematic review and meta-analysis.](https://pubmed.ncbi.nlm.nih.gov/36868297/). *J Shoulder Elbow Surg*, 2023. DOI: 10.1016/j.jse.2023.01.037. ## An exam can find the sore part If soreness keeps limiting sleep or daily use, an exam may find the likely cause. Bring an old scan and the questions that matter to you. Book an appointment: --- What may help a sore shoulder Practical answers about a shoulder ache, simple self-care, urgent symptoms, treatment questions, and a Scottsdale visit. Practical information about shoulder aches, simple self-care, urgent symptoms, and local options. For transparency, this site is run by the owners of QC Kinetix's Phoenix-area clinics. © 2026 Scottsdale Shoulder Fieldbook. Educational information, not individual medical advice.