Medically Reviewed | Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle, Michigan
Quick Answer:
Quick Answer: Foot and ankle injection therapy includes cortisone (corticosteroid) injections for rapid anti-inflammatory relief, platelet-rich plasma (PRP) for tendinopathy and cartilage conditions, hyaluronic acid (viscosupplementation) for ankle arthritis, and alcohol sclerosing injections for Morton’s neuroma. Dr. Biernacki performs ultrasound-guided injections for plantar fasciitis, heel pain, ankle arthritis, Morton’s neuroma, tendinopathy, and joint pain at Balance Foot & Ankle in Howell, Michigan.
Injection therapy is one of the most powerful non-surgical tools in the foot and ankle specialist’s arsenal. When applied accurately to the right condition at the right time, injections can dramatically reduce pain, restore function, and in some cases, provide lasting resolution without surgery. Understanding the different injection types—cortisone, PRP, hyaluronic acid, and alcohol sclerosing—and when each is most appropriate helps patients make informed decisions about their treatment.
Cortisone (Corticosteroid) Injections
Cortisone injections deliver a powerful anti-inflammatory corticosteroid medication directly to the target tissue, rapidly reducing pain and swelling. Cortisone is most effective for conditions driven by acute or subacute inflammation: plantar fasciitis (targeted injection at the plantar fascial insertion), Morton’s neuroma, ankle arthritis, peroneal or posterior tibial tendon sheath inflammation, bursitis, and ankle joint impingement synovitis.
The primary advantage of cortisone is rapid, predictable pain relief—most patients experience significant improvement within 3–7 days and the effect can last weeks to months. Limitations include the risk of tendon weakening with repeated injections (plantar fascia rupture is a known risk of repeated fascial injections), potential for fat pad atrophy with excessive heel injections, and the fact that cortisone treats inflammation without addressing the underlying mechanical cause.
Dr. Biernacki performs cortisone injections under ultrasound guidance for all deep or anatomically complex targets—the heel, ankle joint, and tendon sheaths. Ultrasound-guided injection improves accuracy compared to landmark-based (blind) injection and is associated with superior clinical outcomes in published literature. For simple superficial injections, guidance may not be necessary, but the extra precision of imaging is never harmful.
Platelet-Rich Plasma (PRP) Injections
Platelet-rich plasma is prepared from the patient’s own blood by centrifugation to concentrate the platelet-derived growth factors that promote tissue healing. Injected into the target tissue, PRP delivers a concentrated dose of growth factors (PDGF, TGF-β, VEGF, IGF-1) that stimulate tenocyte proliferation, collagen synthesis, and neovascularization—supporting biological tissue repair rather than simply suppressing inflammation.
PRP is most appropriately used for chronic tendinopathies where the tissue has degenerated into a non-inflammatory state (tendinosis) that cortisone may actually worsen. The best evidence for PRP in the foot and ankle is in chronic plantar fasciitis (multiple randomized controlled trials show PRP superior to cortisone at 6–12 months, though inferior at 1 month), Achilles tendinopathy, and peroneal tendinopathy. PRP is also used for ankle osteoarthritis as an alternative to hyaluronic acid and cortisone.
PRP preparation takes approximately 15–20 minutes in the office. The injection itself is more uncomfortable than cortisone—as the patient’s own concentrated blood is injected into tissue—though local anesthetic can be used to minimize discomfort. Multiple injections (typically 2–3, spaced 4–6 weeks apart) are often recommended for tendinopathy. Insurance coverage for PRP varies widely—many plans do not cover it, and out-of-pocket costs are a consideration for patients.
Hyaluronic Acid (Viscosupplementation) for Ankle Arthritis
Hyaluronic acid (HA) injection—also called viscosupplementation—delivers a lubricating polymer into arthritic joints to supplement the degraded synovial fluid. In the knee, HA injections have an established evidence base. In the ankle joint, published data is less extensive but suggests comparable benefit—particularly for mild-to-moderate ankle arthritis where cortisone’s anti-inflammatory effect has diminishing returns with repeated injections. HA provides longer-lasting lubrication effects compared to cortisone’s anti-inflammatory effect, with a different risk profile (no tendon/fat pad risk, but higher cost).
Alcohol Sclerosing Injections for Morton’s Neuroma
Ultrasound-guided alcohol sclerosing injection is a non-surgical treatment for Morton’s neuroma—the painful enlargement of an interdigital nerve between the metatarsal heads. A series of 4–7 injections of dilute ethanol (4% alcohol solution) is delivered directly into the neuroma under ultrasound guidance, causing progressive sclerosing (chemical destruction) of the enlarged nerve tissue. Published series report 60–85% success rates for pain resolution, making this an effective alternative to surgical excision for appropriate patients.
Sclerosing injections are administered 1–2 weeks apart over several months. Each injection is relatively painless as the neuroma progressively scleroses. Patients typically experience gradual improvement over the injection series. Failed sclerosing therapy does not complicate subsequent surgical excision if eventually needed.
Ultrasound Guidance: Why It Matters
Point-of-care musculoskeletal ultrasound allows the physician to visualize the target structure in real time during injection—confirming needle placement within the target tissue before injecting the medication. For deep structures (ankle joint, tendon sheaths, posterior heel), blind (palpation-based) injections have been shown to have lower accuracy and inferior clinical outcomes compared to image-guided injection. Dr. Biernacki uses ultrasound guidance for all complex foot and ankle injections to maximize accuracy, safety, and therapeutic effectiveness.
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Firm foam roller for calf and arch self-massage—improves post-injection rehabilitation outcomes for plantar fasciitis and tendinopathy patients.
Dr. Tom says: “My podiatrist recommended this for daily calf rolling after my PRP injection—accelerated my recovery.”
Patients in post-injection rehabilitation for plantar fasciitis and tendinopathy
Replacement for injection therapy (self-massage is adjunctive, not curative for established tendinopathy)
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Tuli’s Heavy Duty Heel Cups
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Shock-absorbing heel cups that reduce plantar fascial loading—ideal adjunct to cortisone or PRP injection for plantar fasciitis management.
Dr. Tom says: “Used these immediately after my cortisone injection and they helped maintain the pain relief longer.”
Plantar fasciitis patients using heel cups as adjunct to injection therapy during rehabilitation
Replacement for injection therapy in severe or chronic plantar fasciitis (injection plus mechanical support works better together)
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Firm arch support insoles to maintain the benefits of foot and ankle injection therapy by reducing mechanical stress on treated tissues.
Dr. Tom says: “My podiatrist had me in these immediately after my plantar fasciitis injection—maintained the relief between visits.”
Patients using arch support insoles as adjunct to cortisone or PRP injection for plantar fasciitis and arch conditions
Patients with flexible flat feet who need custom prescription orthotics for adequate mechanical control
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✅ Pros / Benefits
- Ultrasound-guided injection improves accuracy and clinical outcomes for complex deep foot and ankle targets
- PRP outperforms cortisone at 6–12 month follow-up for chronic plantar fasciitis in multiple RCTs
- Alcohol sclerosing series achieves 60–85% pain resolution for Morton’s neuroma without surgery
❌ Cons / Risks
- Cortisone provides rapid relief but does not address underlying mechanical causes—symptoms can recur
- PRP is often not covered by insurance—out-of-pocket costs are a consideration for patients
- Repeated cortisone injections carry risk of plantar fascia rupture and fat pad atrophy with overuse
Dr. Tom Biernacki’s Recommendation
Injection therapy is one of the tools I use most frequently at Balance Foot & Ankle—and I put a lot of thought into choosing the right agent for each patient and condition. Cortisone is fast and powerful, but it’s not always the right choice. For a runner who has had three cortisone shots for plantar fasciitis with diminishing returns, PRP is a much better option—it works differently, it lasts longer, and it actually promotes healing rather than just suppressing inflammation. For Morton’s neuroma, I always offer the alcohol sclerosing series first because for many patients it works without surgery. And for all of these, ultrasound guidance isn’t optional for me—it’s the standard of care for deep foot and ankle injections.
— Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle
Frequently Asked Questions
How long does a cortisone injection last for plantar fasciitis?
Cortisone injection provides rapid relief within 3–7 days, with effects typically lasting 4–12 weeks. Longer-lasting relief is possible when injection is combined with addressing underlying biomechanical causes (orthotics, physical therapy). Repeated cortisone injections are limited to avoid plantar fascia rupture and fat pad atrophy risks.
Is PRP better than cortisone for heel pain?
Studies show cortisone provides superior pain relief in the short term (first 1–3 months), while PRP achieves superior outcomes at 6–12 months. For acute inflammatory plantar fasciitis, cortisone may be the first choice. For chronic, recurrent, or cortisone-resistant plantar fasciitis, PRP is the preferred injection approach.
Does insurance cover PRP injections for foot conditions?
Insurance coverage for PRP injections varies significantly by plan. Many commercial plans do not cover PRP as it is considered investigational for most indications. Medicare generally does not cover PRP. Patients should verify coverage before scheduling. Dr. Biernacki’s office can provide documentation to support prior authorization requests when applicable.
What is ultrasound-guided injection and why does it matter?
Ultrasound-guided injection uses real-time imaging to visualize the needle entering the target tissue—confirming accurate placement before medication is injected. For deep structures like the ankle joint, heel, and tendon sheaths, ultrasound guidance significantly improves accuracy compared to blind palpation-based injection, resulting in better clinical outcomes and fewer complications.
Does Dr. Biernacki perform injection therapy in Michigan?
Yes—Dr. Biernacki performs cortisone, PRP, hyaluronic acid, and alcohol sclerosing injections at Balance Foot & Ankle in Howell, Michigan, using ultrasound guidance for complex targets. Schedule online at MichiganFootDoctors.com or call (517) 579-1881.
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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.
- Plantar Fasciitis: Diagnosis and Conservative Management (PubMed)
- Plantar Fasciitis (APMA)
- Diagnosis and Treatment of Plantar Fasciitis (PubMed / AAFP)
- Heel Pain (APMA)