When is it worth getting a sore joint checked?

What does ordinary joint wear feel like?

Arthritis soreness often comes on little by little. A knee may ache after walking or stiffen while sitting. A hip may make stairs or rising from a chair harder. Shoulder wear can disturb sleep or make overhead reaching difficult.

An old injury can speed up wear in the same joint. Repeated work may also leave a tendon sore. Point to the sore spot, then show the clinician which motion brings it on. Also say when the trouble became hard to ignore.

Could PRP fit the soreness in my joint?

PRP is made by spinning a patient's blood and keeping the platelet-rich part. Favorable reports mostly studied mild or moderate arthritis in the knee. They don't answer every question about a hip, shoulder or badly worn knee. An exam and X-ray can show whether those findings relate to your joint.

A QC Kinetix visit covers non-surgical choices for joint soreness. Here, biologic therapies means care prepared from material such as the patient's blood. The clinician asks how the joint limits your day. Bring earlier X-rays, scan reports and notes about past care.

The visit may lead to exercise advice or a treatment at the clinic. Surgery may still deserve discussion when a joint has severe wear. A consultation doesn't replace that discussion after an operation has been advised. The clinician can explain why each choice does or doesn't fit.

Which signs need quicker medical care?

Seek prompt care for a swollen, hot joint when fever is present. After a new injury, get quick help if the joint looks bent. Being unable to bear weight is another reason to act. A joint that locks also needs a timely exam.

Call for care when soreness rises fast or keeps waking you. New numbness, weakness or loss of bladder or bowel control needs quick help. Redness, spreading warmth or fever after joint care can't wait. Those signs need a medical exam.

Several swollen joints with long morning stiffness may not be simple joint wear. A doctor can check for an illness that affects more than one joint. A rash with joint soreness also deserves a review. Tell the office about blood thinners or bleeding trouble before clinic care.

Sources

1. The ESSKA-ORBIT European consensus on blood-derived orthobiologics graded 28 question-statement sets; only 9 of 28 had high-level scientific support. Three statements reached grade A: that there is enough preclinical and clinical evidence to support PRP use in knee OA; that clinical evidence shows effectiveness in MILD TO MODERATE knee OA (KL grade 3 or lower); and that PRP provides a longer effect than the short-term effect of corticosteroid with a safer profile. The panel regarded PRP as a valid and possible first-line injectable option for KL grades 1-3.

   Laver L, et al. — The use of injectable orthobiologics for knee osteoarthritis: A European ESSKA-ORBIT consensus. Part 1-Blood-derived products (platelet-rich plasma).. Knee Surgery, Sports Traumatology, Arthroscopy, 2024. DOI: 10.1002/ksa.12077.

2. RESTORE, the largest and most rigorously blinded placebo-controlled PRP trial in knee OA (n=288, participant-, injector- and assessor-blinded), gave three weekly injections of a commercial leukocyte-poor PRP or saline. At 12 months the change in knee pain was -2.1 vs -1.8 points (difference -0.4; 95% CI -0.9 to 0.2; P=.17) and the change in medial tibial cartilage volume was -1.4% vs -1.2% (difference -0.2%; P=.81). Twenty-nine of 31 prespecified secondary outcomes showed no between-group difference. The authors concluded the findings do not support the use of PRP for knee OA.

   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.. JAMA, 2021. DOI: 10.1001/jama.2021.19415.

3. The 2025 Cochrane review of stem cell injections for knee osteoarthritis pooled 25 randomised trials (1,341 participants) and found that, compared with placebo injection, stem cell injection MAY slightly improve pain (1.2 points better on a 0-10 scale, 7 studies, 445 participants) and function (14.2 points better on a 0-100 scale, 7 studies, 432 participants) up to six months - both rated LOW-certainty evidence, downgraded for indirectness (cell source, preparation and dose varied across studies) and suspected publication bias, since up to three larger RCTs were conducted and withdrawn before reporting results. Radiographic progression was not assessed in any included study.

   Whittle SL, et al. — Stem cell injections for osteoarthritis of the knee.. Cochrane Database of Systematic Reviews, 2025. DOI: 10.1002/14651858.CD013342.pub2.

4. A systematic review of 32 studies comparing leukocyte-poor and leukocyte-rich PRP in knee OA found both formulations improved pain and function above the MCID with no significant difference between them at 3, 6 or 12 months - but leukocyte-RICH PRP carried significantly higher odds of post-injection pain (OR 1.64; 95% CI 1.29-2.10) and swelling (OR 1.56; 95% CI 1.22-1.99).

   Kim JH, et al. — Adverse Reactions and Clinical Outcomes for Leukocyte-Poor Versus Leukocyte-Rich Platelet-Rich Plasma in Knee Osteoarthritis: A Systematic Review and Meta-analysis.. Orthopaedic Journal of Sports Medicine, 2021. DOI: 10.1177/23259671211011948.

5. FDA states verbatim of stem cell products, stromal vascular fraction (adipose-derived cells), umbilical cord blood, Wharton's jelly, amniotic fluid and exosome products: 'None of these products have been approved for the treatment of any orthopedic condition, such as osteoarthritis, tendonitis, disc disease, tennis elbow, back pain, hip pain, knee pain, neck pain, or shoulder pain.' The only FDA-approved stem cell products in the United States are blood-forming (hematopoietic progenitor) cells derived from umbilical cord blood, approved only for disorders of blood production, and there are currently NO FDA-approved exosome products.

   U.S. Food and Drug Administration — Consumer Alert on Regenerative Medicine Products Including Stem Cells and Exosomes. FDA (Center for Biologics Evaluation and Research), 2020.

6. The AAOS patient-education FAQ on orthobiologics states that because orthobiologics are relatively new the evidence supporting their use is LIMITED, that rigorous testing of effectiveness in most orthopedic conditions is lacking, and that preliminary results are encouraging but hard to evaluate. It names tendinopathies such as tennis elbow, pain from early knee osteoarthritis, adjunct healing after rotator cuff repair, and avascular necrosis as the settings where biologic therapies have shown promise, and notes that stem cell treatments not derived from the patient's own body and further manipulated in a laboratory can only be offered inside an FDA-approved clinical trial.

   American Academy of Orthopaedic Surgeons — Orthobiologics (Regenerative Medicine) FAQ. OrthoInfo (AAOS), 2024.