For chronic plantar fasciitis, PRP may be the better choice for relief that lasts. A cortisone injection gives more relief in the first month, but PRP pulls ahead by 6 months and stays ahead at 12 and 18 months, with fewer repeat injections and surgeries in the PRP group (Shetty et al., 2019). If you want relief that holds up past the first few weeks, PRP's 6-to-18-month advantage over cortisone is the deciding factor.
What Does the Research Suggest for PRP vs. Cortisone in Plantar Fasciitis?
A 3-arm randomized controlled trial compared a corticosteroid injection, a PRP injection, and a placebo group for chronic plantar fasciitis (Shetty et al., 2019). Cortisone produced better pain relief and function within the first month, but at 6, 12, and 18 months PRP was ahead on both measures. At 18 months or later, 23% of the cortisone group had needed a repeat injection versus 17% of the PRP group, and 10% of the cortisone group had opted for surgery versus 3% of the PRP group, small differences in a trial of this size.
Unlike some earlier trials, this study did not indicate a drop-off in cortisone's benefit over time, a pattern the authors partly credited to the plantar fascia's own natural healing course rather than a cortisone failure.
A separate 2024 trial, which followed patients for 6 months, reached the same conclusion; PRP outperformed corticosteroid injection for pain relief and function in chronic plantar fasciitis (Kumar et al., Cureus, 2024).
Why Does PRP Outperform Cortisone Over Time for Plantar Fasciitis?
PRP outperforms cortisone over time because it supports the fascia's own healing rather than only suppressing inflammation, so its benefit builds instead of fading. Cortisone calms inflammation quickly, which is why it edges out PRP in the first few weeks, but it does not address the underlying fascia degeneration driving chronic plantar fasciitis.
Individual results vary, and PRP for plantar fasciitis in the United States is an off-label use of devices cleared to prepare platelet concentrates, not an FDA-approved treatment for the condition itself. Getting the diagnosis right, confirming the pain is coming from the plantar fascia and not a nearby structure, still matters more than which injection is chosen.
If plantar fasciitis pain has not improved with rest, stretching, orthotics, or physical therapy, the next step is finding out exactly what is driving it. Schedule a 2-hour evaluation for your plantar fasciitis heel pain at our Gilbert, AZ clinic (also serving Chandler, Mesa, Queen Creek, and the greater Phoenix area).
If you are unsure whether orthobiologic injections like PRP or stem cell therapy are appropriate, or you are traveling from outside the Phoenix area, you can also call and ask about a brief 15 minute discovery call.
References
- Shetty S, Dhond A, Arora M, Deore S. Platelet-Rich Plasma Has Better Long-Term Results Than Corticosteroids or Placebo for Chronic Plantar Fasciitis: Randomized Control Trial. The Journal of Foot and Ankle Surgery. 2019;58(1):42-46. https://doi.org/10.1053/j.jfas.2018.07.006.
- Kumar S, et al. Comparison of Platelet-Rich Plasma and Corticosteroid Injections for Chronic Plantar Fasciitis: A Randomized Controlled Trial. Cureus. 2024;16(5):e59656. https://doi.org/10.7759/cureus.59656.
NOTE: This article provides general information to help the reader better understand regenerative medicine, nerve and musculoskeletal conditions, naturopathic approaches to pain, and related subjects. All content provided in this article, website, or any linked materials, including text, graphics, images, research, and outcomes, are not intended, and should not be used, as a substitute for direct medical advice, diagnosis, or treatment. Please always consult with a professional and licensed healthcare provider to discuss if any treatment is right for you.