Subtalar Arthritis: Causes, Symptoms & Treatment | DPM

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

What Is Subtalar Arthritis?

Subtalar arthritis is degeneration of the cartilage within the subtalar joint — the articulation between the talus (ankle bone) and calcaneus (heel bone). The subtalar joint controls side-to-side motion of the hindfoot (inversion and eversion) and is critical for walking on uneven terrain. When the subtalar cartilage degenerates, patients experience deep heel and hindfoot pain with activity, stiffness, and difficulty walking on grass or uneven surfaces. Subtalar arthritis is distinct from ankle (tibiotalar) arthritis — it involves the joint just below the ankle, not the ankle joint itself.

Causes of Subtalar Arthritis

Post-traumatic arthritis (the most common cause): Prior calcaneus fracture — even well-treated calcaneus fractures commonly develop subtalar arthritis within 5–10 years. Severe talar fractures, subtalar dislocations, or repetitive microtrauma in athletes. Inflammatory arthritis: Rheumatoid arthritis, psoriatic arthritis, gout, and other inflammatory conditions can affect the subtalar joint. Primary (idiopathic) osteoarthritis: Less common than in the hip or knee, but occurs in older patients, particularly those with flatfoot deformity that places abnormal load on the lateral subtalar joint. Congenital or developmental causes: Tarsal coalition (bony or fibrocartilaginous fusion between the talus and calcaneus) can lead to degenerative subtalar arthritis in adults.

Symptoms

Deep, aching pain in the heel and hindfoot — lateral more than medial; worse on uneven ground, stairs, and prolonged standing; stiffness after rest, especially in the morning; limited ability to rock the foot inward and outward; swelling at the lateral hindfoot; and a feeling that the ankle is unstable or giving way (due to altered subtalar mechanics). Subtalar arthritis pain is often confused with plantar fasciitis (plantar fasciitis is worse on the plantar heel; subtalar arthritis is deeper and more lateral) or ankle sprain. X-ray: weight-bearing X-rays including a Harris axial heel view and 45-degree oblique views show joint space narrowing, sclerosis, and osteophytes. CT scan better characterizes the articular surface; MRI shows cartilage integrity and any adjacent bone marrow edema.

Treatment

Conservative management: Custom orthotics with a rigid heel cup and lateral hindfoot posting reduce subtalar joint stress — often the most effective conservative tool. Ankle-foot orthosis (AFO) or UCBL orthotic for more severe cases. Corticosteroid injection into the subtalar joint: guided by fluoroscopy or ultrasound, provides 4–8 weeks of significant pain relief in most patients — diagnostic (confirms the subtalar joint as the pain source) and therapeutic. Activity modification: avoiding high-impact activities that load the hindfoot. NSAIDs and oral analgesics. When conservative management fails: Subtalar joint fusion (arthrodesis) is the gold-standard surgical treatment for symptomatic subtalar arthritis. The talocalcaneal joint is fused with screws, eliminating the painful motion. Results: 85–90% pain relief at 2 years; patients walk normally with minimal functional limitation since adjacent joints (ankle, Chopart joint) compensate for the lost subtalar motion. Recovery: 8–12 weeks non-weight-bearing, 3–6 months to return to full activity.

Schedule Your Evaluation at Balance Foot & Ankle

Dr. Tom Biernacki evaluates and treats subtalar arthritis at both the Howell and Bloomfield Hills locations. On-site weight-bearing X-rays are available at your first visit. Subtalar corticosteroid injections can be performed at your consultation. Call (810) 206-1402.

In-Office Treatment at Balance Foot & Ankle

If home care isn’t resolving your your foot or ankle concern, a visit with a board-certified podiatrist is the fastest path to accurate diagnosis and a personalized plan. At Balance Foot & Ankle Specialists, Dr. Tom Biernacki, Dr. Carl Jay, and Dr. Daria Gutkin offer same-day and next-day appointments at both our Howell and Bloomfield Hills offices. We perform on-site diagnostic ultrasound, digital X-ray, conservative care, advanced regenerative treatments, and minimally invasive surgery when indicated.

Call (810) 206-1402 or request an appointment online. Most insurance plans accepted, including Medicare, Blue Cross Blue Shield, Aetna, Cigna, and United Healthcare.

Frequently Asked Questions

Dr. Tom Biernacki, DPM is a board-certified podiatric surgeon at Balance Foot & Ankle in Howell and Bloomfield Hills, Michigan. He evaluates and treats subtalar arthritis with corticosteroid injections, orthotics, and surgical fusion.

Most Common Mistake We See

The most common mistake we see is: Waiting too long before seeking care. Fix: any foot pain lasting more than 4 weeks, or any sudden severe symptom, deserves a professional evaluation rather than more rest.

Warning Signs That Need Same-Day Care

Dr. Tom’s Top 3 — The Premium Foot Pain Stack (2026)

If you only buy three things for foot pain, get these. PowerStep + CURREX orthotics correct the underlying foot mechanics, and Dr. Hoy’s pain gel delivers fast topical relief. This is the exact stack Dr. Tom Biernacki, DPM gives his Michigan podiatry patients on visit one — over 10,000 patients have used this exact combination.

Frequently Asked Questions

When should I see a podiatrist?

See a podiatrist if: foot or ankle pain has lasted more than 2–4 weeks without improvement, you’re changing your gait to avoid pain, you have an open wound or sore that isn’t healing, you notice nail discoloration or thickening, you have diabetes and any foot concern, or pain is severe enough to wake you at night. Most foot conditions are easier and cheaper to treat early — what starts as a minor issue can become a surgical problem with months of delay.

What is the difference between a podiatrist and an orthopedic surgeon?

Podiatrists (DPM — Doctor of Podiatric Medicine) specialize exclusively in the foot, ankle, and lower leg. Orthopedic surgeons (MD/DO) have broader musculoskeletal training but variable foot/ankle subspecialization. For foot and ankle-specific problems, a podiatrist often has more focused training and experience. For injuries involving the leg above the ankle, complex pediatric cases, or multi-level reconstruction, orthopedic consultation may be appropriate. We frequently co-manage patients with orthopedic colleagues.

How do I know if my foot pain is serious?

Signs that warrant same-day or next-day evaluation: severe pain that appeared suddenly without clear cause, swelling, redness, and warmth that appeared suddenly (possible gout, infection, or Charcot fracture), an open wound that looks infected (redness spreading, pus, warmth), inability to bear weight, or any foot problem in a diabetic patient. Pain that’s been present for weeks and is stable is important but not an emergency — schedule within 1–2 weeks.

Can foot problems cause back and knee pain?

Yes — this is a kinetic chain effect. Abnormal foot mechanics (overpronation, supination, leg length discrepancy) cause compensatory changes in knee, hip, and lumbar alignment. Roughly 30% of patients presenting to our clinic with knee pain have a treatable foot-level biomechanical cause. Correcting foot mechanics with orthotics or appropriate footwear often provides significant knee and back relief. If you have chronic knee or back pain and haven’t had your foot mechanics evaluated, it’s worth a consult.

Are orthotics worth it?

For the right conditions, yes — custom orthotics are among the most cost-effective interventions in podiatry. They’re most effective for: plantar fasciitis, flat feet with secondary knee/back pain, leg length discrepancy, metatarsalgia, posterior tibial tendon dysfunction, and diabetic foot pressure management. Quality OTC orthotics ($35–60) resolve symptoms for 60% of patients with mild-to-moderate conditions. Custom orthotics are appropriate when OTC options have failed or when the biomechanical problem is complex. We cast custom orthotics in-office.

How do I choose the right running shoes?

Start with your foot type (flat, neutral, high arch) and running pattern (overpronator, neutral, supinator). Flat feet and overpronators do best in stability or motion-control shoes. Neutral feet do well in neutral-cushioned shoes. High arches need maximum cushioning with flexible soles. Always buy running shoes at the end of the day (foot swelling peaks then), get properly fitted by a specialist, and replace every 300–500 miles. If you’ve been injured repeatedly, a gait analysis can identify the mechanical flaw driving your injury pattern.

What is the difference between a sprain and a fracture?

A sprain is a ligament injury (the tissue connecting bones); a fracture is a break in the bone itself. Both can occur with the same trauma (ankle roll, fall). The old test — ‘if you can walk, it’s not broken’ — is wrong; many fractures are initially weight-bearable. Key differences: a fracture typically produces localized bone tenderness along the bone itself, while a sprain is tender over the ligament. X-ray is the standard to differentiate. High-grade sprains without proper treatment can be as disabling as fractures.

How do I prevent foot and ankle injuries?

The four most impactful prevention strategies: (1) Supportive, appropriately fitted footwear for your foot type and activity. (2) Gradual activity progression — the 10% rule (never increase weekly mileage or intensity by more than 10%). (3) Regular calf and ankle mobility work. (4) Strengthening the posterior tibial tendon, peroneals, and intrinsic foot muscles. Most overuse injuries are preventable; most acute injuries are not — but ankle sprain recurrence (60–70% without rehab) is prevented by balance and proprioception training.