Tarsal tunnel syndrome is the foot’s equivalent of carpal tunnel syndrome — compression of the tibial nerve as it passes through a narrow canal behind and below the inner ankle. At Balance Foot & Ankle, our Michigan podiatrists diagnose and treat tarsal tunnel syndrome conservatively and surgically, with most patients achieving significant pain relief.
What Is Tarsal Tunnel Syndrome?
The tarsal tunnel is a narrow space beneath the flexor retinaculum (a thick ligament) on the inner side of the ankle. The tibial nerve — along with tendons and blood vessels — passes through this tunnel. When pressure builds inside the tunnel, the tibial nerve becomes compressed, producing characteristic nerve pain.
Symptoms
Tarsal tunnel syndrome typically causes burning, tingling, or electric shock-like pain along the inner ankle and sole of the foot. Pain may radiate into the toes (especially the big toe, second, and third toes) or up the calf. Symptoms are often worse with prolonged standing or walking and may improve with rest and elevation. Some patients report that symptoms wake them from sleep, particularly after a day on their feet. A positive Tinel’s sign — tapping over the tarsal tunnel reproduces or radiates pain — is a key clinical finding.
Causes and Contributing Factors
Anything that reduces the space inside the tarsal tunnel can compress the tibial nerve. Common causes include:
- Flat feet (overpronation): The most common cause — medial ankle collapse stretches and kinks the nerve
- Varicose veins or venous engorgement within the tunnel
- Ganglion cysts or lipomas occupying space in the tunnel
- Previous ankle fractures or sprains causing scar tissue
- Inflammatory arthritis (rheumatoid, gout) causing synovial swelling
- Diabetes — peripheral neuropathy lowers the nerve’s threshold for compression symptoms
Diagnosis
Our podiatrists diagnose tarsal tunnel syndrome through history, physical exam, and targeted testing. Nerve conduction velocity (NCV) and electromyography (EMG) studies objectively measure tibial nerve function and can localize the level of compression. MRI identifies space-occupying lesions (cysts, varicosities, masses) that require surgical removal. Diagnostic ultrasound can visualize the nerve in real time and may show nerve swelling or extrinsic compression.
Conservative Treatment
Most patients begin with a structured non-surgical program:
- Custom orthotics: Correct overpronation to unload the tarsal tunnel; the most important conservative intervention for flat-foot-related cases
- NSAIDs: Reduce local inflammation and nerve irritation
- Corticosteroid injection: Into the tarsal tunnel — provides temporary but often significant relief; diagnostic as well as therapeutic
- Night splint: Maintains the foot in slight dorsiflexion to reduce nerve traction during sleep
- Activity modification: Avoid prolonged standing on hard surfaces
- Supportive footwear: Stability shoes with arch support replace flat or unsupportive footwear
Approximately 50–60% of patients improve with conservative care alone when the underlying cause (especially flat foot) is addressed.
Tarsal Tunnel Release Surgery
When conservative treatment fails after 3–6 months, or when a structural lesion is present, surgical release of the flexor retinaculum decompresses the tibial nerve. The procedure involves:
- A curved incision behind the medial malleolus (inner ankle bump)
- Complete division of the flexor retinaculum under direct visualization
- Release of any individual nerve branch compressions (medial and lateral plantar nerves)
- Removal of any space-occupying lesions (cysts, lipomas, varicosities)
Surgery is performed outpatient under ankle block anesthesia. Most patients bear weight in a surgical boot the same day. Recovery involves 6–8 weeks of protected activity, followed by gradual return to full activity. Clinical studies report 75–85% patient satisfaction after tarsal tunnel release when patients are appropriately selected.
Frequently Asked Questions
How is tarsal tunnel syndrome different from plantar fasciitis?
Plantar fasciitis causes sharp heel pain that is worst with the first steps in the morning and eases with walking. Tarsal tunnel syndrome causes burning, tingling, or electric nerve pain along the inner ankle and sole — often worse with prolonged activity. The location of tenderness differs: plantar fasciitis pain is at the heel bone’s inner attachment; tarsal tunnel pain is at the tarsal tunnel just behind the inner ankle. A positive Tinel’s sign (nerve pain radiating with tapping) helps identify tarsal tunnel syndrome.
Can orthotics cure tarsal tunnel syndrome?
Custom orthotics are the single most effective conservative treatment for flat-foot-related tarsal tunnel syndrome. By correcting overpronation, orthotics reduce tension on the tibial nerve and relieve compression. In well-selected patients (those with clear flat foot mechanics and no structural lesion), orthotics alone achieve significant improvement in 50–60% of cases. They are less effective when the cause is a cyst, varicosity, or scar tissue.
How long is recovery from tarsal tunnel surgery?
Most patients return to light activity and work within 6–8 weeks. Full return to athletic activity, prolonged standing, or strenuous work takes approximately 3–4 months. Nerve recovery (burning and tingling relief) may continue to improve for up to 12 months after surgery, as injured nerves regenerate slowly. Complete nerve healing depends on how long compression was present before surgery — earlier intervention yields better outcomes.
Is tarsal tunnel syndrome covered by insurance in Michigan?
Yes — both conservative treatment and surgical release for tarsal tunnel syndrome are covered by major Michigan insurance plans including Blue Cross Blue Shield, Aetna, Priority Health, HAP, and Medicare. Prior authorization may be required for surgery, which our office handles. See our Insurance & Costs page for more details.
Where can I get tarsal tunnel treatment near me in Michigan?
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Balance Foot & Ankle treats tarsal tunnel syndrome at locations in Howell, Brighton, and surrounding Livingston County communities. Our podiatrists offer custom orthotics, corticosteroid injections, and surgical release — all in-office or at a nearby outpatient surgical center. Call us or book online for a prompt evaluation.
Learn more about insurance and costs for foot and ankle procedures on our Insurance & Costs page.
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Dr. Tom Biernacki, DPM is a board-qualified podiatrist and foot & ankle surgeon serving Southeast Michigan at Balance Foot & Ankle Specialists. A Michigan native, Dr. Biernacki earned his undergraduate degree from Michigan State University and his Doctor of Podiatric Medicine (DPM) from Kent State University College of Podiatric Medicine. He completed a three-year comprehensive surgical residency in foot and ankle surgery in the Detroit metro area.
Dr. Biernacki specializes in the treatment of heel pain, bunions, hammertoes, diabetic foot care, sports injuries, flatfoot correction, and minimally invasive foot surgery. He is dedicated to providing evidence-based, patient-centered care that helps people of all ages stay active and pain-free.
He sees patients at multiple convenient Metro Detroit locations and is committed to community education through the MichiganFootDoctors.com resource library. Dr. Biernacki is a member of the American Podiatric Medical Association (APMA) and the Michigan Podiatric Medical Association (MPMA).