Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle, Howell & Bloomfield Hills, MI
Last reviewed: May 2026
Balance Foot & Ankle offers same-day appointments for urgent foot and ankle conditions across Southeast Michigan — but the most important factor in outcomes isn’t getting seen quickly. Our podiatrists explain what to do in the first 24-48 hours before your appointment that most patients skip entirely. Call (810) 206-1402 — expert podiatric care across Michigan.
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Medically Reviewed | Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle, Michigan
Achilles Tendon Pain: Two Conditions, Two Completely Different Treatments
Achilles tendinopathy — the umbrella term for Achilles tendon pain and dysfunction — encompasses two distinct clinical entities that look similar on the surface but require fundamentally different treatment approaches. Getting this distinction right determines whether treatment succeeds or fails, and it’s why so many patients with “Achilles tendinitis” fail initial treatment: they’re receiving the protocol for the wrong diagnosis.
At Balance Foot & Ankle, Dr. Tom Biernacki begins every Achilles evaluation by precisely localizing the pain — because the treatment for insertional disease at the heel bone is completely different from midsubstance tendinopathy in the body of the tendon.
Insertional Achilles Tendinopathy
Insertional Achilles tendinopathy affects the distal 2cm of the tendon where it attaches to the posterior calcaneus (heel bone). Pain is maximal at this attachment point — felt as a hard, tender bump at the back of the heel — and is often associated with a Haglund deformity (prominent posterosuperior calcaneal tuberosity) and calcific spur within the tendon at its insertion. Symptoms are provoked by shoe counter pressure against the prominence and by push-off activity.
Treatment is fundamentally different from midsubstance disease. Heel drops and downhill eccentric exercises — the gold standard for midsubstance Achilles tendinopathy — are contraindicated in insertional disease because they increase tensile load at the insertion, worsening the condition. Instead, treatment uses: heel lifts (reducing insertional tensile stress), avoidance of shoe counter pressure (backless shoes or heel cutouts), isometric Achilles exercises (reducing pain without eccentric loading), and PRP injection into the tendon-bone interface. Calcific spur and Haglund deformity causing refractory pain are addressed with endoscopic Achilles debridement and calcaneal exostectomy.
Midsubstance Achilles Tendinopathy
Midsubstance tendinopathy affects the body of the Achilles tendon, typically 2–6cm above the calcaneal insertion — the “watershed zone” with the poorest intrinsic blood supply. Pain is located in the mid-tendon, there is no bony prominence, and symptoms are aggravated by running and activity with some morning stiffness. Degenerative changes (tendinosis) — disorganized collagen, mucoid infiltration, neovascularization — replace the normal parallel fiber architecture on ultrasound and MRI.
Midsubstance tendinopathy responds to the Alfredson eccentric heel drop protocol — 3 sets of 15 repetitions twice daily for 12 weeks, performed off the edge of a step with controlled eccentric lowering. This produces physiological tendon remodeling and is the most evidence-based conservative intervention available. Ultrasound-guided PRP injection accelerates tendon healing in cases refractory to eccentric exercise. Surgical stripping and debridement is a last resort for truly refractory midsubstance tendinopathy.
Achilles Tendon Rupture
Complete Achilles tendon rupture — often described as feeling like being struck or kicked from behind with a palpable gap in the tendon — is a different condition entirely from tendinopathy and requires urgent evaluation. The Thompson test (absence of plantarflexion with calf squeeze in prone position) confirms the diagnosis. Management — operative repair versus functional bracing with early range of motion — depends on patient age, activity level, and time to presentation. Outcomes with both approaches are good when properly implemented.
Diagnostic Ultrasound for Achilles Evaluation
Diagnostic ultrasound is the ideal imaging tool for Achilles tendon assessment — it visualizes tendon architecture, identifies intratendinous tears, demonstrates calcific deposits, and guides injection therapy with precision. At Balance Foot & Ankle, ultrasound is available at every Achilles evaluation, allowing same-day imaging and ultrasound-guided PRP injection when indicated without requiring a separate radiology appointment.
PRP for Achilles Tendinopathy
Platelet-rich plasma (PRP) injection delivers a concentrated preparation of the patient’s own growth factors into the degenerative tendon, stimulating cellular repair and collagen remodeling. Evidence is strongest for midsubstance Achilles tendinopathy refractory to eccentric loading — with clinically significant improvement in pain and function at 6 and 12 months. Insertional tendinopathy responds to PRP at the tendon-bone interface. Our ultrasound guidance ensures precise delivery to the pathological tissue rather than adjacent normal tendon.
Dr. Tom's Product Recommendations
Prostretch Plus for Achilles and Calf Stretching
⭐ Highly Rated
Biomechanical stretching platform for the Alfredson eccentric heel drop protocol — the gold standard exercise for midsubstance Achilles tendinopathy. Provides stable, controlled positioning for eccentric stretching off a step safely.
Dr. Tom says: “My podiatrist prescribed the Alfredson eccentric protocol on this device. Three months of consistent use and my midsubstance Achilles pain went from an 8 to a 1. I run again without pain.”
Midsubstance Achilles tendinopathy, Alfredson eccentric protocol, gastrocnemius-soleus stretching
Insertional Achilles tendinopathy — eccentric heel drops are contraindicated at the insertion
Disclosure: We earn a commission at no extra cost to you.
Heel Lifts Achilles Tendon Relief Wedge
⭐ Highly Rated
Cushioned heel lift inserts that reduce insertional Achilles tendon tensile stress by tilting the heel upward — the primary conservative intervention for insertional Achilles tendinopathy. Reduces the painful stretching force at the tendon-bone attachment.
Dr. Tom says: “My podiatrist diagnosed insertional Achilles and immediately put heel lifts in both my shoes. The relief was almost immediate — the pressure right at the heel bone was gone.”
Insertional Achilles tendinopathy, Haglund deformity, posterior heel pain, calcaneal attachment pain
Midsubstance Achilles tendinopathy — heel lifts are not the primary treatment for mid-tendon disease
Disclosure: We earn a commission at no extra cost to you.
HOKA Bondi 8 Running Shoe
⭐ Highly Rated
Maximum stack height running shoe with meta-rocker geometry that reduces Achilles tendon peak load by shortening the lever arm at push-off. Recommended for both insertional and midsubstance Achilles tendinopathy during active treatment.
Dr. Tom says: “My podiatrist said the rocker sole on these HOKAs reduces stress on my Achilles at push-off. I went from barely being able to walk to running five miles again within two months of switching.”
Achilles tendinopathy rehabilitation footwear, reduced peak Achilles tendon loading, Michigan runners with tendon pain
Patients with severe overpronation requiring motion control
Disclosure: We earn a commission at no extra cost to you.
✅ Pros / Benefits
- Precise insertional vs. midsubstance distinction — the critical determinant of treatment success
- In-office diagnostic ultrasound for tendon architecture assessment and injection guidance
- Ultrasound-guided PRP injection for refractory tendinopathy
- Alfredson protocol prescription for midsubstance disease — the evidence-based gold standard
- Surgical consultation for Haglund deformity and refractory midsubstance tendinopathy
❌ Cons / Risks
- Achilles tendinopathy recovery typically takes 3–6 months of consistent treatment
- PRP injection success rates are approximately 70–80% for appropriately selected patients
- Surgical Achilles procedures require 4–6 weeks of protected boot immobilization
- Achilles tendon rupture requires urgent evaluation and surgical or conservative management decision
Dr. Tom Biernacki’s Recommendation
The Achilles tendon is one of the most common and most mismanaged problems in sports medicine. Patients get told ‘stretch your calf’ for both insertional and midsubstance disease — and the insertional patients get worse because stretching increases the very force that’s damaging the insertion. Getting the diagnosis right in the first visit is the entire battle. Everything after that is execution.
— Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle
Frequently Asked Questions
What is the difference between insertional and midsubstance Achilles tendinopathy?
Insertional Achilles tendinopathy produces pain right at the back of the heel bone where the tendon attaches, often with a hard bony prominence. Midsubstance tendinopathy produces pain in the body of the tendon, typically 2–6cm above the heel — there’s no bony bump, just tendon pain. The distinction matters because treatments that work for midsubstance (eccentric heel drops) can worsen insertional disease.
How long does Achilles tendinopathy take to heal?
Midsubstance Achilles tendinopathy responds to the Alfredson eccentric protocol in most patients over 12 weeks of consistent twice-daily exercise. Insertional disease may take longer — 4–6 months — because the treatment options are more limited and the mechanical environment is harder to control. PRP injection accelerates recovery in refractory cases.
Should I run through Achilles pain?
Complete rest is not indicated for most Achilles tendinopathy — tendons need mechanical load to remodel. The Alfredson protocol specifically uses heavy load to stimulate tendon healing. However, high-impact training at levels that produce significant pain after activity should be modified. The goal is maintaining controlled training load while following the rehabilitation protocol.
What is PRP for Achilles tendinopathy?
Platelet-rich plasma (PRP) is the patient’s own blood centrifuged to concentrate growth factors that stimulate tendon repair. Injected under ultrasound guidance directly into the degenerated tendon tissue, PRP provides a concentrated biological signal for cellular repair and collagen remodeling. It is most effective for chronic midsubstance tendinopathy that has failed 3+ months of eccentric loading.
Can I tear my Achilles tendon if I have tendinopathy?
Degenerated tendons are at increased rupture risk compared to healthy tendons — the mucoid and degenerative changes within the tendon weaken its tensile strength. However, ruptures most commonly occur in tendons that appeared clinically asymptomatic before rupture, and they typically occur in the degenerated watershed zone of the midsubstance. Treating symptomatic tendinopathy likely reduces long-term rupture risk by improving tendon biology through appropriate rehabilitation.
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When should I see a podiatrist?
If symptoms persist past 2 weeks, affect your normal activity, or are accompanied by red-flag symptoms (warmth, redness, swelling, inability to bear weight).
What does treatment cost?
Most diagnostic visits and conservative treatments are covered by Medicare and major insurers. Out-of-pocket costs vary by your specific plan.
How quickly can I get an appointment?
Most non-urgent cases see us within 5 business days. Urgent cases (sudden pain, possible fracture) typically same or next business day.
In-Office Treatment at Balance Foot & Ankle
If home treatment isn’t providing relief for your foot issues, our podiatry team at Balance Foot & Ankle can help with same-day evaluations and advanced in-office care.
Ready to get relief? Book an appointment at Balance Foot & Ankle or call (810) 206-1402. Same-day appointments available in Howell & Bloomfield Hills, MI.
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Dr. Tom Biernacki, DPM is a board-certified foot & ankle surgeon (ABFAS & ABPM) 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 made him one of the most-followed foot & ankle educators on YouTube.