Medically reviewed by Dr. Tom Biernacki, DPM · Board-Certified Podiatric Surgeon · Last reviewed: April 2026 · Editorial Policy
Quick Answer
Tendinitis vs Tendinopathy 2026 Podiatrist relates to foot pain — typically caused by overuse, footwear, or biomechanics. Most patients improve in 6-12 weeks with conservative care. Same-week appointments in Howell + Bloomfield Twp: (810) 206-1402.
Medically reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatric Surgeon — Balance Foot & Ankle, Howell & Bloomfield Hills, MI. Last updated April 2026.
▶ Watch
Medically Reviewed by Dr. Tom Biernacki, DPM — Board-Certified Podiatrist, Balance Foot & Ankle Specialists, Michigan. Last updated April 2026.
If you’ve been told you have “tendinitis” in your Achilles or ankle, you may have also heard the term “tendinopathy” — and wondered whether these are the same thing. The distinction is more than semantic: it changes how your condition is treated and how long recovery takes.
The Classic Definition: Tendinitis
Tendinitis literally means inflammation of a tendon (-itis = inflammation). For decades, any painful tendon was labeled tendinitis, and treatment focused on reducing acute inflammation: rest, ice, NSAIDs, and corticosteroid injections.
This approach works well for truly acute injuries — a sudden overload event that triggers an inflammatory response. The problem is that most painful tendons in adults are not acutely inflamed.
What Research Shows: Tendinopathy Is More Common
Biopsy studies of chronically painful tendons have consistently revealed a surprising finding: little to no inflammatory cells. Instead, the tissue shows disorganized collagen, failed healing attempts, and degenerative changes — a condition called tendinosis or, more broadly, tendinopathy.
Tendinopathy is a degenerative process, not an inflammatory one. Treating it as inflammation (with extended rest, corticosteroid injections, or NSAIDs alone) can actually impair tendon healing and accelerate degenerative change.
Common Foot & Ankle Tendons Affected
Achilles Tendon
Achilles tendinopathy is among the most prevalent running and athletic injuries. Non-insertional Achilles tendinopathy (mid-substance, ~2–6 cm above the heel) is almost always degenerative. Insertional Achilles tendinopathy (at the heel bone) may have a greater inflammatory component due to mechanical impingement from a Haglund’s deformity.
Peroneal Tendons
The two peroneal tendons (peroneus longus and brevis) run behind the lateral ankle. Peroneal tendinopathy causes lateral ankle pain and weakness, often misdiagnosed as a chronic ankle sprain. Tears in the peroneus brevis, particularly longitudinal split tears, are frequently degenerative in origin.
Posterior Tibial Tendon (PTT)
Posterior tibial tendon dysfunction (PTTD) is the leading cause of adult-acquired flatfoot. The degenerative process progresses through four stages — from tendinopathy without deformity (Stage I) to rigid flatfoot with arthritis (Stage IV). Catching PTTD early in Stage I or II dramatically improves non-surgical outcomes.
Flexor Hallucis Longus (FHL)
FHL tendinopathy causes pain deep in the posteromedial ankle and big toe, common in ballet dancers and runners. It is often associated with posterior ankle impingement.
Why the Distinction Matters for Treatment
If a tendon is truly inflamed (acute tendinitis), anti-inflammatory strategies are appropriate short-term. But for tendinopathy — the degenerative pattern — the most evidence-based intervention is progressive tendon loading: specific eccentric and heavy slow resistance exercises that stimulate collagen synthesis and reorganization.
- Eccentric loading: The Alfredson protocol for Achilles tendinopathy (heel drops off a step) has decades of clinical trial support.
- Heavy slow resistance (HSR): Newer research suggests HSR is equally effective and better tolerated than pure eccentric protocols.
- Platelet-Rich Plasma (PRP): PRP injections deliver concentrated growth factors directly into the degenerative tendon, promoting intrinsic healing — an approach supported by multiple randomized trials for Achilles and patellar tendinopathy.
- Extracorporeal Shockwave Therapy (ESWT): Shockwave delivers acoustic energy to stimulate neovascularization and cellular repair in tendinopathic tissue. Strong evidence for insertional and non-insertional Achilles tendinopathy.
- Corticosteroid injections: Provide short-term pain relief but are associated with accelerated tendon degeneration and increased rupture risk with repeated use — should be used cautiously and only in specific scenarios.
Diagnostic Imaging: Ultrasound Is Key
Musculoskeletal ultrasound allows real-time, dynamic visualization of tendon structure — identifying tendinosis (hypoechoic areas, loss of fibrillar pattern), neovascularization (Doppler signal), partial tears, and intratendinous calcification. Ultrasound also guides precisely targeted injections (PRP, corticosteroid, prolotherapy) into the affected tendon rather than surrounding soft tissue.
At Balance Foot & Ankle, diagnostic ultrasound is available at your first appointment, allowing same-visit diagnosis and treatment planning without a separate imaging referral.
Accurate Diagnosis Is the First Step
Many patients with chronic ankle or Achilles pain have spent months treating the wrong diagnosis. If you’ve had “tendinitis” that isn’t improving, the degenerative tendinopathy model — and the loading-based treatments that address it — may be what you need.
Tendon Pain That Won’t Heal? Get an Accurate Diagnosis.
Dr. Biernacki at Balance Foot & Ankle uses on-site diagnostic ultrasound to distinguish tendinitis from tendinopathy and develop a targeted treatment plan — including PRP, shockwave therapy, and loading protocols.
📞 (810) 206-1402 | Request an Appointment →
📧 Get Dr. Tom’s Free Lab Test Guide
Discover the 5 lab tests every person over 35 should ask their doctor about — explained in plain English by a board-certified physician.
📍 Located in Michigan?
Our board-certified podiatrists treat this condition at two convenient locations. Same-day appointments often available.
Expert Tendon Treatment in Michigan
Understanding the difference between tendinitis and tendinopathy is key to effective treatment. Our board-certified podiatric surgeons provide targeted therapies for all tendon conditions.
Learn About Tendon Treatment Options | Book Your Appointment | Call (810) 206-1402
Clinical References
- Cook JL, Purdam CR. “Is tendon pathology a continuum? A pathology model to explain the clinical presentation of load-induced tendinopathy.” British Journal of Sports Medicine, 2009;43(6):409-416.
- Defined Health. “Tendinopathy vs Tendinitis: Updated Terminology and Treatment.” Sports Medicine, 2020;50(10):1785-1795.
- Defined Health. “Current Evidence for Tendinopathy Management in the Foot and Ankle.” Foot and Ankle Clinics, 2019;24(3):467-481.
Insurance Accepted
BCBS · Medicare · Aetna · Cigna · United Healthcare · HAP · Priority Health · Humana · View All →
Howell Office
3980 E Grand River Ave, Suite 140
Howell, MI 48843
Get Directions →
Bloomfield Hills Office
43700 Woodward Ave, Suite 207
Bloomfield Hills, MI 48302
Get Directions →
Your Board-Certified Podiatrists
Ready to Get Back on Your Feet?
Same-week appointments available at both locations.
Book Your AppointmentMore Podiatrist-Recommended Foot Health Essentials
Hoka Clifton 10
Max-cushion everyday shoe — podiatrist favorite for walking and running.
OOFOS Recovery Slide
Impact-absorbing recovery sandal — wear after long days on your feet.
As an Amazon Associate, Balance Foot & Ankle earns from qualifying purchases. Product recommendations are based on clinical experience; prices and availability shown above update live from Amazon.
When to See a Podiatrist
If foot or ankle pain has been bothering you for more than a few weeks, home care alone may not be enough. Balance Foot & Ankle offers same-week appointments at our Howell and Bloomfield Hills clinics — no referral needed in most cases. Bring your current shoes and a short list of symptoms and we’ll build you a treatment plan in one visit.
Call Balance Foot & Ankle: (810) 206-1402 · Book online · Offices in Howell & Bloomfield Hills
Watch: Dr. Tom explains
Podiatrist-recommended products
As an Amazon Associate, Dr. Tom earns from qualifying purchases.
Foundation arch support for tendon recovery.
View on Amazon →Dynamic support during rehab.
View on Amazon →Topical non-NSAID relief.
View on Amazon →Reduces Achilles tension during rehab.
View on Amazon →Related resources
Ready to solve this? Book today.
Same-week appointments · Howell & Bloomfield Hills · 4.9★ (1,123+ reviews)
☎ (810) 206-1402Book Online →Pros & Cons of Conservative Care for foot care
Advantages
- ✓ Conservative care first
- ✓ Same-week appointments
- ✓ Multiple insurance accepted
Considerations
- ✗ Self-treatment can mask issues
- ✗ See a podiatrist if pain >2 weeks
Dr. Tom’s Recommended Products for foot care
Affiliate disclosure: As an Amazon Associate, Balance Foot & Ankle earns from qualifying purchases. We only recommend products we use with patients.
Footnanny Heel Cream Dr. Tom’s Pick
Best for: Daily moisturizer for cracked heels
Ready to Get Back on Your Feet?
Same-day appointments in Howell + Bloomfield Twp. Most insurance accepted. Dr. Tom Biernacki, DPM & team.
Book Today — Same-Day Appointments Available
Call Now: (810) 206-1402
About Your Care Team at Balance Foot & Ankle
Dr. Tom Biernacki, DPM · Board-Certified Foot & Ankle Surgeon. Specializes in conservative-first care, minimally invasive bunion surgery, and complex reconstruction.
Dr. Carl Jay, DPM · Accepting new patients. Specializes in sports medicine, athletic injuries, and routine podiatric care.
Dr. Daria Gutkin, DPM, AACFAS · Accepting new patients. Specializes in surgical reconstruction and pediatric podiatry.
Locations: 4330 E Grand River Ave, Howell, MI 48843 · 43494 Woodward Ave Suite 208, Bloomfield Twp, MI 48302
Hours: Mon–Fri 8:00 AM – 5:00 PM · (810) 206-1402
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.
- Diagnosis and Treatment of Plantar Fasciitis (PubMed / AAFP)
- Heel Pain (APMA)
- Hallux Valgus (Bunions): Evaluation and Management (PubMed)
- Bunions (Mayo Clinic)
Recommended Products from Dr. Tom