Cavus Foot (High Arch): Causes, Problems It Causes, and Treatment

Quick answer: Treatment for cavus foot treatment follows a stepwise approach: 1) conservative care first (rest, ice, supportive footwear, OTC anti-inflammatories), 2) physical therapy and targeted exercises, 3) in-office treatments (injections, custom orthotics) if conservative fails at 4-6 weeks, 4) surgery for refractory cases. Most patients resolve at step 1 or 2. Call (810) 206-1402.

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✅ Medically reviewed by Dr. Tom Biernacki, DPM — Board-certified podiatrist specializing in foot & ankle surgery. View credentials.

What Is Cavus Foot (High Arch)?

Cavus foot (pes cavus) is a structural foot deformity characterized by an abnormally high arch that does not flatten with weight-bearing. Unlike flat feet—which are common, usually benign, and rarely symptomatic—cavus foot is often associated with significant clinical problems. The elevated arch places abnormal stress on the forefoot and hindfoot, leading to calluses under the metatarsal heads, heel pain, lateral ankle instability, peroneal tendon problems, and stress fractures. The rigid arch also limits the foot’s ability to absorb impact, transferring greater load to surrounding structures.

Cavus foot has two broad categories: flexible (the arch partially reduces with loading) and rigid (no reduction with weight-bearing). Rigid cavus deformity is more clinically significant and harder to treat. Severity ranges from mild high-arch feet that cause only cosmetic concern to severe deformity with claw toes, plantar fascia contracture, and near-complete loss of shock absorption.

Neurological Causes: Why a Full Workup Is Essential

Progressive or bilateral cavus foot deformity—particularly when accompanied by weakness, muscle wasting, sensory changes, or balance problems—should prompt neurological evaluation. Approximately 60–70% of cavus feet have an identifiable neurological cause, most commonly Charcot-Marie-Tooth disease (CMT, hereditary motor and sensory neuropathy), the most common inherited peripheral neuropathy. Other neurological causes include spinal cord abnormalities (syringomyelia, tethered cord), Friedreich’s ataxia, and polio sequelae.

In cavus foot with a neurological etiology, the deformity is typically progressive—it worsens over time as the neurological condition evolves. Identifying the underlying cause affects not only foot treatment but also medical management, genetic counseling (CMT is inherited), and assessment for other neurological complications. Any patient with a newly identified cavus foot should be asked about family history, weakness, and sensory changes, and referred for neurological evaluation if indicated.

Problems Caused by Cavus Foot

The high arch creates characteristic load distribution problems. The heel and forefoot bear disproportionate weight while the midfoot is unloaded. Painful plantar calluses develop under the 1st and 5th metatarsal heads (the lateral forefoot prominences). Hammertoes and claw toes form as intrinsic muscle weakness and extensor tendon tightness pull the toes into flexion. Lateral ankle instability is common—the hindfoot varus (heel tilted inward) inherent in cavus foot places the ankle in a mechanically unstable position. Peroneal tendon tears and stress fractures of the 5th metatarsal are significantly more common in cavus foot patients.

Treatment: Conservative and Surgical

Conservative management focuses on symptom control and load redistribution. Extra-depth, wide-toe-box footwear accommodates claw toe deformities and reduces forefoot pressure. Custom orthotics with metatarsal pads offload plantar prominences and provide lateral wedging to correct hindfoot varus. Ankle bracing addresses lateral instability. Physical therapy addresses peroneal and intrinsic muscle strengthening where neurologically possible.

Surgery for symptomatic cavus foot addresses the underlying structural deformity rather than just symptoms. Common procedures include: plantar fascia release to reduce arch contracture, metatarsal osteotomies to plantarflex elevated metatarsal heads, calcaneal osteotomy to correct hindfoot varus, peroneus longus to brevis tendon transfer (in CMT, the peroneus longus is overactive and plantarflexes the 1st ray—transferring it to the brevis corrects the deformity), and hammertoe corrections. For the most severe cases with rigid deformity and arthritis, triple arthrodesis (fusion of the subtalar, talonavicular, and calcaneocuboid joints) corrects alignment at the cost of hindfoot motion.

Frequently Asked Questions

Medical References & Sources

• American Orthopaedic Foot & Ankle Society — Cavus Foot
• PubMed Research — Cavus Foot Etiology and Treatment
• PubMed Research — Cavus Foot Surgical Outcomes

Dr. Tom Biernacki, DPM is a board-certified podiatric surgeon at Balance Foot & Ankle in Howell and Bloomfield Township, Michigan. He evaluates and treats cavus foot deformity with custom orthotics, lateral ankle stabilization, and surgical reconstruction including calcaneal osteotomy, tendon transfers, and hammertoe correction.

In-Office Treatment at Balance Foot & Ankle

If home treatment isn’t providing relief for your foot and ankle pain, our podiatry team at Balance Foot & Ankle can help with expert evaluations and advanced in-office care.

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