Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.

Injection therapy plays an important role in the management of plantar fasciitis when structured conservative care — stretching, orthotics, night splints, and anti-inflammatory measures — fails to achieve adequate pain relief. Two injection options have emerged as the primary choices: corticosteroid injection, the traditional approach with decades of clinical use, and platelet-rich plasma (PRP) injection, a newer regenerative technique with a growing evidence base. Understanding the mechanisms, evidence, risks, and appropriate patient selection for each guides optimal clinical decision-making.

Corticosteroid Injection: Rapid Relief with Important Limitations

Corticosteroid injection delivers a potent anti-inflammatory agent (typically methylprednisolone or triamcinolone acetonide) directly to the origin of the plantar fascia at the medial calcaneal tuberosity, rapidly suppressing the inflammatory cascade and providing pain relief. Multiple randomized controlled trials demonstrate that corticosteroid injection produces significant pain reduction within 1–4 weeks — faster than most other interventions. This speed of effect is its principal advantage for patients with acute, disabling heel pain who require rapid functional restoration. The limitations, however, are significant: corticosteroid effect is typically temporary, with pain frequently returning to baseline by 3–6 months in patients with chronic plantar fasciitis. Repeated corticosteroid injections carry cumulative risks: plantar fascia rupture (incidence 2–10% with multiple injections), fat pad atrophy at the injection site producing permanent loss of the heel’s natural cushioning, and, rarely, calcaneal osteomyelitis. For these reasons, most podiatric surgeons limit corticosteroid injections to 1–2 per year at a given site and avoid repeat injection in patients who have already experienced partial fascia rupture or significant fat pad loss.

Platelet-Rich Plasma (PRP) Injection: Sustained Regenerative Effect

PRP is prepared from the patient’s own blood by centrifugation to concentrate platelets (typically 5–7× baseline concentration) and the growth factors they contain — including platelet-derived growth factor (PDGF), transforming growth factor-beta (TGF-β), vascular endothelial growth factor (VEGF), and insulin-like growth factor (IGF-1). These growth factors stimulate fibroblast recruitment, collagen synthesis, neovascularization, and tissue remodeling at the injection site — addressing the underlying tendinopathic degeneration of the plantar fascia rather than simply suppressing inflammation. Multiple well-designed randomized controlled trials and systematic reviews demonstrate that while PRP produces slower onset of relief than corticosteroid (peak effect at 3–6 months), it produces substantially more durable improvement at 6–12 month follow-up. A pivotal comparison trial (Mahindra et al.) demonstrated PRP superiority over corticosteroid at 6 months, with PRP patients maintaining greater functional improvement at 12 months. PRP carries no risk of plantar fascia rupture or fat pad atrophy, making it the preferred injection modality for patients with chronic plantar fasciitis, those who have had previous corticosteroid injections, and patients in whom long-term durability is the priority over speed of relief.

Ultrasound-Guided Injection: Accuracy Matters

Both corticosteroid and PRP injections are substantially more effective when delivered with ultrasound guidance, which confirms placement precisely at the thickened, hypoechoic fascia origin. Blind injection studies demonstrate inaccurate needle placement in 20–30% of cases, reducing both efficacy and potentially increasing adverse events. Dr. Biernacki at Balance Foot & Ankle performs ultrasound-guided PRP and corticosteroid injections for plantar fasciitis, tailoring injection selection to each patient’s clinical history, prior treatment responses, and recovery timeline priorities. Call (810) 206-1402 to discuss which injection approach is appropriate for your heel pain.

PRP vs. Cortisone for Plantar Fasciitis

PRP (platelet-rich plasma) and corticosteroid injections both treat plantar fasciitis but work differently and have different risk profiles. Our podiatrists help you choose the best injection therapy based on your condition severity and treatment goals.

Discuss Injection Options With Our Team → | Book Your Appointment | Call (810) 206-1402

Clinical References

1. Mahindra P, et al. “Chronic Plantar Fasciitis: Effect of Platelet-Rich Plasma, Corticosteroid, and Placebo.” Orthopedics. 2016;39(2):e285-e289.
2. Acosta-Olivo C, et al. “Platelet-Rich Plasma Versus Corticosteroids for Plantar Fasciitis: A Systematic Review and Meta-Analysis.” Journal of Foot and Ankle Surgery. 2022;61(1):169-175.
3. David JA, et al. “Injected Corticosteroids for Treating Plantar Heel Pain in Adults.” Cochrane Database of Systematic Reviews. 2017;6:CD009348.

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Dr. Tom Biernacki, DPM is a double board-certified podiatrist and foot & ankle surgeon at Balance Foot & Ankle Specialists in Southeast Michigan. With over a decade of clinical experience, he specializes in heel pain, bunions, diabetic foot care, sports injuries, and minimally invasive surgery. Dr. Biernacki is a member of the APMA and ACFAS, and his patient education content on MichiganFootDoctors.com and YouTube has reached over one million views.