Medically Reviewed | Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle, Michigan
Quick Answer: Shooting pain in the heel is most commonly caused by plantar fasciitis (sharp initial step pain), tarsal tunnel syndrome (electric/tingling radiating from the ankle), or Baxter’s nerve entrapment (pain on the medial heel). Each has distinct characteristics and requires different treatment.
Plantar Fasciitis: The Most Common Cause
Plantar fasciitis produces sharp, stabbing heel pain — often described as ‘stepping on glass’ or ‘stabbing with a knife’ with the first steps in the morning. The pain is at the medial calcaneal tuberosity (the bony point on the bottom of the heel where the plantar fascia attaches) and may radiate along the arch.
The characteristic timing distinguishes plantar fasciitis from nerve conditions: pain is worst first thing in the morning (post-static dyskinesia), eases after a few minutes of walking as the fascia warms and stretches, worsens again after prolonged activity, and improves with rest. This ‘warm-up’ and subsequent worsening pattern is classic.
Risk factors: flat feet (increased fascial tension), tight calf muscles (equinus limiting dorsiflexion), obesity, sudden increase in walking or running mileage, and thin-soled footwear. Diagnosis is clinical, confirmed by ultrasound showing fascial thickening >4mm.
Tarsal Tunnel Syndrome: The Nerve Cause
Tarsal tunnel syndrome (TTS) is compression of the posterior tibial nerve as it passes through the tarsal tunnel — the fibro-osseous channel posterior and inferior to the medial malleolus. This produces shooting, burning, or electric pain radiating from the inside of the ankle into the heel, arch, and toes.
Key distinguishing features from plantar fasciitis: TTS pain is often burning and electric in character (neuropathic quality); it may be worse at night; it radiates from the medial ankle into the foot rather than localizing to the heel tuberosity; and Tinel’s sign (tapping the posterior tibial nerve at the medial ankle produces electric pain radiating into the foot) is positive.
Causes of TTS: varicose veins within the tarsal tunnel (most common), ganglion cysts, lipomas, bone spurs, severe flatfoot deformity, and space-occupying lesions. Treatment: orthotics to reduce pronation and decrease tunnel volume, orthotics for flatfoot correction, local cortisone injection, and surgical decompression for refractory cases.
Baxter’s Nerve Entrapment
Baxter’s nerve (the first branch of the lateral plantar nerve) is compressed between the plantar fascia and the abductor hallucis muscle belly at the medial heel. It produces medial heel pain — often similar to plantar fasciitis — but typically without the first-step morning pattern. Numbness of the lateral heel may accompany the pain.
Baxter’s nerve entrapment is estimated to be present in 20% of chronic heel pain cases — often coexisting with plantar fasciitis and going undiagnosed. Ultrasound-guided cortisone injection targeting the nerve entrapment site is highly diagnostic and therapeutic.
If conservative management of ‘plantar fasciitis’ fails after 6 months, Baxter’s nerve entrapment should be considered. MRI may show fatty atrophy of the abductor digiti quinti (a muscle innervated by Baxter’s nerve) — an objective sign of chronic denervation.
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✅ Pros / Benefits
- Plantar fasciitis — the most common cause — responds well to conservative treatment
- Tarsal tunnel can be definitively decompressed surgically when conservative care fails
- Baxter’s nerve injection is both diagnostic and therapeutic in the same visit
❌ Cons / Risks
- Multiple conditions can coexist — making diagnosis complex
- Tarsal tunnel syndrome is frequently misdiagnosed as plantar fasciitis
- Nerve conditions may require months of conservative management before surgical consideration
Dr. Tom Biernacki’s Recommendation
Heel pain is my most common presenting complaint — and distinguishing plantar fasciitis from a nerve condition is one of the most important clinical skills I apply. The character of the pain, its timing, and its distribution tell the story. Electric, burning pain that’s worse at night suggests nerve. Sharp, first-step morning pain that warms up suggests fascia. Exam and ultrasound confirm. The treatment is completely different, so the diagnosis matters enormously.
— Dr. Tom Biernacki, DPM | Board-Certified Podiatric Surgeon | Balance Foot & Ankle
Frequently Asked Questions
How do I know if my heel pain is nerve or fascia?
Plantar fasciitis: sharp, localized to the heel bottom, worst first steps, warms up. Nerve: burning/electric, radiates, may be worse at night, doesn’t fully warm up. Clinical examination distinguishes them.
What is Tinel’s sign?
Tapping a compressed nerve reproduces the radiating electric pain in its distribution. Positive Tinel’s at the medial ankle indicates tarsal tunnel syndrome.
Can plantar fasciitis and tarsal tunnel occur together?
Yes — they frequently coexist. ‘Double crush’ phenomenon where both conditions must be addressed for adequate relief.
Does heel pain ever require surgery?
Yes — for plantar fasciitis that fails 6+ months of conservative care (endoscopic plantar fasciotomy), and for tarsal tunnel syndrome that fails conservative management (surgical decompression).
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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.
Frequently Asked Questions
Can I see a podiatrist for heel pain without a referral?
How long does plantar fasciitis take to heal?
Should I walk on my heel if it hurts?
What does a podiatrist do for heel pain?
- Plantar Fasciitis: Diagnosis and Conservative Management (PubMed)
- Plantar Fasciitis (APMA)
- Diagnosis and Treatment of Plantar Fasciitis (PubMed / AAFP)
- Heel Pain (APMA)
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