Cavovarus (High-Arched) Foot
Overview
A cavovarus foot has a high arch and tends to load the outer border. Some high-arched feet are painless; others cause recurrent ankle sprains, calluses, stress injury, clawing or peroneal tendon problems. A new, progressive or markedly asymmetric deformity—particularly with weakness or altered sensation—may signal an underlying neurological condition. Treatment must address both local symptoms and the alignment or muscle imbalance driving them.
Common symptoms
- Repeated lateral ankle sprains or a feeling of instability.
- Pain beneath the first or fifth metatarsal, lateral border or heel.
- Calluses, claw toes and difficulty fitting shoes.
- Peroneal tendon pain or tears.
- Stress fractures of the metatarsals or other bones.
- Progressive weakness, altered sensation or balance difficulty when a neurological cause is present.
Why does cavovarus develop?
The deformity may be driven by a first metatarsal that points downwards, a heel tilted inwards, muscle imbalance, previous trauma or a nerve or muscle condition such as Charcot–Marie–Tooth disease. In some people no specific cause is identified.
A new, progressive, markedly asymmetric or bilateral deformity associated with weakness or altered feeling may require assessment for a nerve or muscle condition. Treating only the ankle ligaments without correcting important high-arched inward-tilting alignment can lead to recurrent failure.
Assessment and imaging
Examination identifies whether the inward heel position is flexible, which part of the foot drives the deformity, tendon strength, ankle stability, toe clawing, calf tightness, sensation and areas of pressure. Shoes and wear patterns provide useful information.
Weight-bearing foot and ankle X-rays and a hindfoot alignment view assess shape and arthritis. MRI or ultrasound may evaluate peroneal tendons or cartilage. CT is used for complex bone deformity or arthritic joints. Nerve-conduction studies, spinal imaging or genetics may be appropriate when a neurological condition is suspected.
Non-surgical treatment
- Footwear with adequate depth and cushioning.
- An insole designed for a high-arched foot, to redistribute pressure away from the outer border and forefoot rather than simply raise the arch further.
- An ankle brace for instability and an ankle-foot brace when muscle weakness is significant.
- Strength, balance and flexibility work tailored to the muscles that remain functional.
- Callus care, activity modification and treatment of associated tendon pain.
- Monitoring for progression when a neurological cause is present.
When may surgery be considered?
Surgery may be considered when pain, recurrent instability, progressive deformity, skin pressure or difficulty with bracing remains unacceptable despite appropriate non-surgical treatment. The operation is built around the deformity drivers and available muscle function.
Procedures may include plantar fascia or tendon releases, tendon transfers, controlled bone cuts in the first metatarsal or heel, midfoot correction, ankle ligament reconstruction and correction of claw toes. A rigid or arthritic deformity may require fusion of selected joints. Several components are often combined to create a balanced foot that rests more evenly on the ground.
Recovery and expectations
Bone and tendon procedures require protection in a splint, cast or Moonboot and often a period of non-weight-bearing. Rehabilitation restores movement where preserved, retrains transferred tendons, improves balance and adapts footwear or bracing.
Surgery cannot cure an underlying nerve or muscle disease. The goal is usually improved stability, pressure distribution and the ability to fit and use a brace comfortably, with fewer painful sprains or ulcers. Further change over time is possible.
Risks and limitations
- Wound problems, infection, blood clots or nerve injury.
- Delayed or failed bone healing, or loss of correction.
- Persistent pain, weakness, stiffness or residual callus.
- Over-correction or under-correction.
- Recurrent instability or progression of neurological deformity.
- Need for further surgery or ongoing bracing.
Frequently asked questions
Is a high arch always abnormal?
No. Some people have a painless high arch. Treatment is considered for symptoms, instability, pressure or progression.
Why might I need a neurological assessment?
Progressive cavus, especially in both feet with weakness or sensory change, can be a sign of an underlying nerve or muscle condition.
Can an orthotic correct the bones?
It does not change adult bone shape, but a correctly designed device can redistribute load and reduce pain or instability.
Why combine tendon and bone procedures?
A durable correction requires both alignment and muscle balance. Correcting only one component may leave the foot unstable.
Will surgery prevent all future sprains?
No. It can improve alignment and stability, but rehabilitation, footwear and any neurological progression continue to matter.
General information
This page provides general information only. It cannot diagnose your condition or replace advice from a clinician who has assessed you. Your treatment and recovery plan may differ from the examples described here. Follow the instructions from your treating team. In an emergency, call 000 or attend the nearest emergency department.