Medically reviewed by Dr. Tom Biernacki, DPM
Board-certified podiatric surgeon | Balance Foot & Ankle, Howell & Bloomfield Township, MI
Last reviewed: May 2026
Tarsal tunnel syndrome tests (Tinel’s sign, Valleix phenomenon, tourniquet test) have individually poor sensitivity — but combining three positive tests with classic symptom distribution raises diagnostic accuracy enough to justify nerve conduction study. A single positive test in isolation cannot diagnose tarsal tunnel syndrome. Call (810) 206-1402 — tarsal tunnel evaluation in Michigan.
Tarsal tunnel syndrome (TTS) is compression of the posterior tibial nerve or its branches within the tarsal tunnel — the fibro-osseous canal behind the medial malleolus bounded by the flexor retinaculum and medial ankle bones. Clinical diagnosis relies on a combination of provocative tests, electrodiagnostic studies, and imaging, because symptoms (plantar burning, numbness, and heel tingling) overlap with plantar fasciitis, peripheral neuropathy, and lumbar radiculopathy. No single test is diagnostic — the highest sensitivity comes from combining Tinel sign, dorsiflexion-eversion test, and nerve conduction studies.
Tarsal Tunnel Syndrome: Diagnostic Tests
| Test | Technique | Positive Result | Sensitivity / Specificity |
|---|---|---|---|
| Tinel sign (tarsal tunnel) | Percussion directly over the posterior tibial nerve at the medial malleolus, distal to the tip | Tingling, electric shock, or pain radiating into the plantar foot or toes | Sensitivity 60-75%; specificity 68-80%; best combined with other tests |
| Dorsiflexion-eversion test (Kinoshita) | Examiner maximally dorsiflexes ankle and everts foot, then applies pressure over tarsal tunnel for 5-10 seconds | Reproduction of burning, tingling, or numbness in the plantar foot distribution | Sensitivity 85-90%; highest clinical sensitivity of any provocative test for TTS |
| Compression test | Direct sustained digital compression over tarsal tunnel for 30 seconds | Paresthesias reproduced in plantar foot territory | Sensitivity 50-65%; useful adjunct but lower reliability alone |
| Tourniquet test | Blood pressure cuff inflated above systolic on calf; held 2 minutes | Plantar paresthesias provoked within 2 minutes (nerve ischemia) | Sensitivity 65-70%; less specific — positive in any peripheral neuropathy |
| Nerve conduction study (NCS) / EMG | Electrophysiologic measurement of conduction velocity and latency across tarsal tunnel | Prolonged distal motor latency (>6.2ms); slowed sensory conduction; denervation on EMG | Sensitivity 80-90% for moderate-severe TTS; may be falsely negative in early or mild cases |
Tarsal Tunnel Syndrome vs. Common Mimics
| Condition | Key Distinguishing Feature | Differentiating Test |
|---|---|---|
| Plantar fasciitis | Plantar heel pain worst with first morning steps; not plantar burning or numbness; no Tinel sign | Ultrasound fascia thickness; no nerve conduction abnormality |
| Peripheral neuropathy | Bilateral symmetric stocking distribution; no positive Tinel or dorsiflexion-eversion test; systemic cause | NCS shows diffuse bilateral slowing vs. focal tarsal tunnel slowing; HbA1c, B12 |
| Lumbar radiculopathy (S1) | Back pain or buttock pain; dermatomal pattern; positive straight leg raise; symptoms above ankle | Lumbar MRI; EMG paraspinal muscles; SLR; NCS shows proximal versus distal abnormality |
| Heel fat pad atrophy | Central heel pain on weight-bearing; visible pad thinning; no paresthesias; no Tinel | Ultrasound heel pad thickness; no nerve conduction abnormality |
At Balance Foot & Ankle in Howell and Bloomfield Township, tarsal tunnel syndrome is diagnosed with combined Tinel testing, dorsiflexion-eversion provocation, and nerve conduction studies — and MRI is used to identify space-occupying lesions (ganglion cyst, lipoma, varicosities) compressing the nerve within the tunnel. Call (810) 206-1402.
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Doctor Answer
What is the tarsal tunnel test and what does it diagnose?
The tarsal tunnel test, also called Tinel’s sign at the ankle, involves tapping over the tibial nerve behind the medial malleolus to reproduce tingling or electric sensations into the foot. A positive test suggests tarsal tunnel syndrome, a compression neuropathy of the tibial nerve. Confirmation typically requires nerve conduction studies and MRI to identify the cause of compression.
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.
More questions patients ask
How is tarsal tunnel syndrome tested clinically?
Clinical tests include: Tinel's sign (tapping over the tarsal tunnel at the medial malleolus reproduces tingling in the foot — 58% sensitive, 75% specific), dorsiflexion-eversion test (passively dorsiflexing and everting the foot for 10 seconds to compress the tarsal tunnel — 81% sensitive), and provocative testing with direct pressure over the tunnel. No single test is reliable alone; combination testing improves accuracy.
What is the gold standard test for tarsal tunnel syndrome?
Nerve conduction velocity (NCV) and electromyography (EMG) are the gold standard for confirming tibial nerve compression. Diagnostic criteria: slowed tibial nerve conduction at the tarsal tunnel, reduced amplitude of plantar nerve compound muscle action potentials. Limitations: NCV misses 10–15% of confirmed tarsal tunnel cases ('false negatives') due to testing the large-fiber component while small-fiber compression may predominate. MRI identifies compressive lesions but doesn't measure nerve function.
What other conditions mimic tarsal tunnel syndrome?
Plantar fasciitis (heel and arch pain, but no burning/tingling in toes), Morton's neuroma (interdigital burning, not diffuse arch/heel), Baxter's nerve entrapment (medial heel pain, no toe symptoms), S1 radiculopathy (radiates from low back down the leg), and tarsal coalition (restricted subtalar motion). Bilateral presentation of tarsal tunnel-like symptoms often indicates systemic neuropathy (diabetes, hypothyroidism) rather than localized compression.
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