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.
| Syndrome | Nerve Entrapped | Location | Sensory Loss | Motor Deficit | Cause |
|---|---|---|---|---|---|
| Anterior Tarsal Tunnel Syndrome (Deep Peroneal) | Deep peroneal nerve | Under inferior extensor retinaculum; dorsal ankle | 1st–2nd toe web space (dorsal) | Extensor digitorum brevis (EDB) weakness/atrophy (advanced) | Tight shoe laces; ankle osteophytes; ganglia; repetitive dorsiflexion |
| Superficial Peroneal Nerve Entrapment | Superficial peroneal nerve | Anterior lower leg; fascia exit point 10–12cm above ankle | Dorsal foot (lateral); 3rd–5th toes | None (purely sensory nerve at this level) | Tight boots; ankle sprain; fascial herniation; compartment syndrome |
| Tarsal Tunnel Syndrome (Posterior Tibial) | Posterior tibial nerve branches (medial/lateral plantar + calcaneal) | Tarsal tunnel behind medial malleolus | Plantar foot; medial heel; toes (plantar) | Intrinsic weakness in severe cases; clawing | Space-occupying lesion; flatfoot valgus; varicosities; lipoma; ganglion |
| Sural Nerve Entrapment | Sural nerve | Lateral ankle; behind fibula; distal 3rd of leg | Lateral heel; lateral 5th toe (dorsolateral) | None | Ankle sprain; fibular fracture; tight cast; peroneal tendon surgery |
| Interdigital Neuroma (Morton’s) | Interdigital nerve (plantar) | 2nd–3rd or 3rd–4th interspace; plantar forefoot | Adjacent sides of affected toes; burning/numbness | None | Tight narrow shoes; metatarsal head crowding; repetitive compression |
| Treatment | Indication | Protocol | Success Rate | Recovery |
|---|---|---|---|---|
| Shoe Modification | Compression from tight laces or shoe tongue | Wide-toe box shoe; re-lacing skipping pressure eyelet; tongue pad | 70–80% resolution if compression was primary cause | Immediate; 2–4 weeks to full resolution |
| Custom Orthotics | Flatfoot-driven tarsal tunnel or deep peroneal entrapment | UCBL or semi-rigid orthotic controls excessive pronation; reduces nerve stretch | 60–70% in flatfoot-driven cases | Ongoing; use with shoe modification |
| Ultrasound-Guided Corticosteroid Injection | Perineural inflammation confirmed by US; failed shoe modification | US-guided triamcinolone 20–40mg adjacent to nerve; max 2 injections | 60–75% short-term; 40–50% long-term | Days to 2 weeks for effect |
| Surgical Decompression | Anatomic entrapment confirmed (osteophyte, ganglion, retinaculum); failed 3–6 months conservative care; EMG positive | Release of inferior extensor retinaculum; removal of compressive lesion; neurolysis | 75–90% for anatomic entrapment; lower for diffuse entrapment | 2–4 weeks protected; 6–8 weeks full activity |
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Medically Reviewed | Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle, Michigan
Quick Answer:
Quick Answer: Deep peroneal nerve entrapment (anterior tarsal tunnel syndrome) causes pain, numbness, and tingling on the top of the foot and between the first and second toes. The nerve is compressed beneath the inferior extensor retinaculum—often by tight shoe laces, osteophytes, or ganglion cysts. Dr. Biernacki at Balance Foot & Ankle evaluates and treats this condition in Michigan.
Numbness and burning on the top of the foot—specifically between the first and second toes—is a telltale sign of deep peroneal nerve entrapment, also called anterior tarsal tunnel syndrome. While less well-known than tarsal tunnel syndrome (which affects the inside of the ankle), deep peroneal nerve compression is a real and treatable condition that significantly impacts quality of life for runners, hikers, and patients with arthritic bone spurs on the dorsal foot. Balance Foot & Ankle’s Dr. Tom Biernacki provides expert evaluation and management of this often-overlooked nerve entrapment in Michigan.
Anatomy: The Deep Peroneal Nerve at the Ankle
The deep peroneal nerve descends the anterior (front) of the leg supplying motor function to ankle dorsiflexors and toe extensors. As it crosses the ankle, it passes beneath the superior and inferior extensor retinacula—tight fibrous bands that form the “anterior tarsal tunnel.” Distal to the ankle, the deep peroneal nerve provides sensation exclusively to the first web space (between the first and second toes). This specific sensory distribution is the anatomic signature of anterior tarsal tunnel syndrome.
What Causes Deep Peroneal Nerve Compression?
The most common causes are extrinsic compression and bony impingement. Tight shoelaces or high tongue pressure from running shoes or ski boots compress the nerve at the retinaculum level—this is especially common in long-distance runners and cyclists. Dorsal osteophytes (bone spurs) on the talar neck or navicular—a hallmark of ankle osteoarthritis and impingement—create bony channels that mechanically compress the nerve during dorsiflexion. Ganglion cysts arising from the ankle joint or extensor tendon sheaths are another structural compressor. Edema from ankle sprains or fractures may transiently compress the nerve.
Symptoms of Anterior Tarsal Tunnel Syndrome
The classic presentation is burning, aching, or numbness on the top of the foot with specific involvement of the first web space. Symptoms often worsen while wearing shoes (particularly those with tight lacing over the dorsum) and improve barefoot or with loosened laces. Night pain is common—the nerve is sensitized and may ache at rest. A Tinel’s sign over the extensor retinaculum may reproduce first web space paresthesias. Weakness in toe extension is rare but can occur with severe or prolonged compression affecting motor branches.
Diagnosis and Confirmation
Clinical diagnosis rests on the characteristic symptom distribution plus Tinel’s sign. Nerve conduction velocity studies can demonstrate slowed conduction across the entrapment site—a useful objective finding when the diagnosis is uncertain. Weight-bearing foot and ankle X-rays identify dorsal osteophytes. MRI visualizes ganglion cysts, synovial proliferation, and nerve swelling. Diagnostic perineural injection with local anesthetic at the retinaculum provides immediate symptom relief confirming the entrapment site.
Treatment
Conservative management is highly effective for extrinsic compression cases. Relacing shoes to skip the eyelet over the dorsal prominence, using tongue pads to redistribute pressure, switching to shoes with a lower tongue, and activity modification resolve many cases. Corticosteroid injection at the entrapment site reduces nerve inflammation. When bony osteophytes are causative, the treatment is surgical: anterior ankle arthroscopy or open osteophyte excision removes the mechanical compressor. For ganglion cysts, aspiration or surgical excision is appropriate. Retinaculum release (surgical decompression) is the definitive intervention for refractory cases without identifiable structural cause.
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Structural bony or mass-related entrapment requiring medical evaluation
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Dorsal nerve pressure from shoe tongue, lace groove formation over the ankle
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✅ Pros / Benefits
- Extrinsic compression cases (footwear-related) resolve with simple, low-cost modifications without any medical intervention
- Accurate diagnosis with perineural injection confirms the nerve is the pain source before committing to surgery
- Arthroscopic osteophyte removal is minimally invasive with rapid recovery for bony impingement cases
❌ Cons / Risks
- Frequently misdiagnosed as extensor tendinitis or nonspecific dorsal foot pain—requires nerve examination awareness
- Nerve conduction studies are not always conclusive in mild cases, requiring clinical diagnosis
- Surgical release for refractory cases without identifiable structural cause has variable outcomes
Dr. Tom Biernacki’s Recommendation
Anterior tarsal tunnel syndrome is one of those conditions where the fix is sometimes embarrassingly simple and sometimes surprisingly involved. I’ve had runners come in convinced they have extensor tendinitis, and we spend thirty seconds relacing their shoe differently and the numbness is gone. Other patients have significant ankle osteoarthritis with dorsal spurs mechanically strangling the nerve—those need surgical decompression. The key is not jumping to conclusions. Do the exam, find the Tinel’s, confirm with injection, then look for the structural explanation before deciding on treatment.
— Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle
Frequently Asked Questions
Why does the top of my foot go numb when I run?
This is the classic presentation of deep peroneal nerve compression. Your shoelace tightening during foot swelling creates a pressure point directly over the extensor retinaculum where the nerve crosses. Try skipping one eyelet on the dorsum of your shoe, loosening laces slightly, or using elastic lace locks. If symptoms persist despite footwear modification, see Dr. Biernacki for evaluation of structural causes including bone spurs or ganglion cysts.
Is anterior tarsal tunnel syndrome the same as tarsal tunnel syndrome?
No—they are different conditions affecting different nerves. Tarsal tunnel syndrome involves the posterior tibial nerve on the inside (medial) of the ankle, causing plantar foot and heel burning. Anterior tarsal tunnel syndrome involves the deep peroneal nerve on the front (dorsal) of the ankle, causing top-of-foot and first web space symptoms. The anatomic location and treatment approach differ significantly.
Do I need surgery for deep peroneal nerve entrapment?
Most patients with footwear-related compression do not require surgery—conservative modifications resolve the problem. Patients with bone spurs, ganglion cysts, or failed conservative care may benefit from surgical decompression. Dr. Biernacki performs a thorough evaluation to determine which category you fall into before recommending any intervention.
Can bone spurs on the top of my ankle compress a nerve?
Yes—dorsal ankle osteophytes (bone spurs) at the talar neck or navicular are a well-recognized cause of deep peroneal nerve entrapment. The nerve passes directly over these surfaces, and during dorsiflexion (walking, running), the spur can mechanically compress or impinge on the nerve. Weight-bearing X-rays and MRI confirm the diagnosis. Arthroscopic or open osteophyte removal resolves the compression.
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Frequently Asked Questions
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.
Visit Balance Foot & Ankle — Same-Day Appointments Available
Our podiatry team serves patients throughout Michigan including Howell, Brighton, and Bloomfield Hills. If you’re dealing with heel pain, ingrown toenails, or a foot injury, we have same-day appointment availability.
OrthoInfo – AAOS: Tarsal Tunnel Syndrome
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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.
- Plantar Fasciitis: Diagnosis and Conservative Management (PubMed)
- Plantar Fasciitis (APMA)
- Diagnosis and Treatment of Plantar Fasciitis (PubMed / AAFP)
- Heel Pain (APMA)