High arches are most often caused by an underlying neurological condition. About two-thirds of cases trace back to a nerve or muscle disorder that disrupts the balance of power between muscle groups in the foot, pulling the arch higher than normal. The remaining third are considered idiopathic, meaning no clear cause is found, though some of these likely have a subtle neurological or genetic component that hasn’t been identified yet.
How Muscle Imbalance Creates a High Arch
Your foot’s arch height depends on a tug-of-war between muscles that pull the foot upward and those that pull it downward, along with muscles that tilt it inward versus outward. When a neurological condition weakens certain muscles while leaving others intact, the stronger muscles win. Over time, the unopposed pull reshapes the foot’s bony architecture, raising the arch and tilting the heel inward.
This imbalance also affects the toes. As the arch climbs, tendons running along the top of the foot pull the toe joints into abnormal positions, leading to claw toes or hammertoes. The ball of the foot and the heel end up bearing a disproportionate share of your body weight, since the raised middle section no longer makes proper contact with the ground.
Charcot-Marie-Tooth Disease: The Most Common Cause
Charcot-Marie-Tooth (CMT) disease is the single most common cause of high arches. It’s a group of inherited nerve disorders that gradually damage the peripheral nerves running to the hands and feet. As those nerves deteriorate, the small muscles in the foot weaken unevenly, and the arch rises.
CMT affects roughly 1 in 2,500 people and comes in several subtypes. CMT1 involves damage to the insulating coating around nerves, while CMT2 affects the nerve fibers themselves. Researchers have identified at least 17 genetic variations linked to different forms of CMT, spanning genes involved in nerve structure and signaling. The condition typically develops in adolescence or early adulthood and worsens slowly over decades. When a person has high arches in both feet, CMT is the first diagnosis clinicians consider.
Other Neurological Conditions
A wide range of neurological disorders beyond CMT can produce high arches, each through its own pattern of muscle weakness or spasticity.
- Friedreich ataxia: A progressive condition affecting the spinal cord and cerebellum that causes coordination problems. High arches are one of the earliest visible signs.
- Cerebral palsy: Spasticity in certain leg muscles can pull the foot into a high-arched position, particularly in children.
- Polio and post-polio syndrome: Weakness of the calf muscles creates a distinctive pattern where the heel tilts upward and the forefoot drops to compensate, producing a high arch.
- Spinal cord problems: Tumors, tethered spinal cord, and conditions like spina bifida (myelomeningocele) can damage the nerves that control foot muscles.
- Stroke and Parkinson disease: Damage to the brain’s movement-control centers can alter muscle tone in the foot enough to raise the arch on one side.
This list isn’t exhaustive. Conditions as varied as ALS, Huntington disease, and even leprosy can produce high arches through different mechanisms of nerve or muscle damage. The common thread is always an imbalance in the muscles that shape the foot.
When Only One Foot Is Affected
Whether one or both feet are involved is an important clue to the cause. Bilateral high arches, affecting both feet symmetrically, point toward inherited conditions like CMT or Friedreich ataxia. A high arch on just one side raises concern about something pressing on nerves asymmetrically: a spinal cord tumor, a tethered spinal cord, or damage from a prior injury or stroke. Unilateral cases generally prompt more urgent investigation to rule out conditions that could worsen without treatment.
Idiopathic and Structural Causes
In roughly one-third of cases, no neurological condition is found. These are labeled “idiopathic,” but that doesn’t necessarily mean nothing is going on. Some people simply inherit a foot shape with a higher arch, and this runs in families without being linked to any nerve disorder. The genetic basis for arch shape in healthy people remains poorly understood. A 2025 systematic review found no direct studies identifying specific gene variants that control foot arch height in the general population, calling it a significant research gap.
Trauma can also produce a high arch. Fractures that heal in poor alignment, severe burns causing scar tissue contracture, or compartment syndrome (where swelling damages muscles in a closed space) can all reshape the foot over time. These cases are less common but important to recognize because the treatment approach differs.
Certain muscle diseases unrelated to nerves can contribute as well. Conditions affecting the proteins that make muscles contract, including disorders of the myosin and actin systems, can create imbalances that lead to foot deformities. These overlap with a group of conditions called distal arthrogryposis syndromes, where joints become stiff due to restricted movement during development.
What High Arches Feel Like Day to Day
Not everyone with high arches has symptoms. Some people go through life with a noticeably high arch and never experience problems. When symptoms do develop, they tend to center on pain in predictable locations. The ball of the foot takes excessive pressure and can develop metatarsalgia, a painful inflammation under the forefoot that worsens with standing or walking. The outer edge of the foot bears more weight than it should, making ankle sprains more frequent because the foot naturally tilts inward.
Claw toes and hammertoes develop as the muscle imbalance pulls the smaller toes into curled positions. This creates painful pressure points where toes rub against shoes. Calluses build up under the ball of the foot and along the outer edge. Over time, the repetitive strain can lead to stress fractures in the metatarsal bones, particularly in active people.
How High Arches Are Diagnosed
Diagnosis starts with a visual exam, but the key clinical test is called the Coleman block test. You stand with your heel and the outer edge of your foot on a one-inch-high block while letting the inner part of your forefoot hang off the edge. If your heel straightens out when you do this, it tells clinicians that the deformity originates in the forefoot and that the hindfoot is still flexible. That distinction matters because a flexible foot responds better to conservative treatment and less invasive surgery.
X-rays taken from the side measure specific angles in the foot. The most important is Meary’s angle, which in a normal foot falls between negative 4 and positive 4 degrees. A measurement outside that range confirms the arch is abnormally high and helps quantify how severe the deformity is. If a neurological cause is suspected, nerve conduction studies and sometimes genetic testing follow.
Managing High Arches
The primary goal of treatment is spreading your body weight over a larger area of the foot and improving stability. For most people, this starts with custom orthotics. Research from multiple studies shows that the orthotic needs to conform extremely closely to the shape of your arch to be effective. This “total contact” design fills the gap under the raised arch so that pressure distributes more evenly across the entire sole rather than concentrating on the heel and ball.
Off-the-shelf insoles rarely work well for high arches because they’re designed around an average arch height. A generic insert leaves empty space under a high arch and fails to provide the support where it’s needed most. Custom-molded orthotics, made from a cast or 3D scan of your foot, consistently outperform prefabricated options for this condition.
Shoes matter too. A shoe with a wider base, a supportive heel counter, and extra depth in the toe box accommodates the foot shape better and reduces friction on curled toes. High-top shoes or ankle braces can help if ankle instability is a problem.
When conservative measures aren’t enough, surgery addresses the structural deformity directly. The specific procedures depend on whether the foot is still flexible or has become rigid, where the deformity originates, and what’s causing it. Options range from tendon transfers that rebalance the muscle forces, to bone cuts that realign the arch, to joint fusions for severe rigid cases. Recovery typically involves several weeks of non-weight-bearing followed by a gradual return to activity in a walking boot.
High Arches in Children
High arches in children deserve careful attention because they may be the first visible sign of a neurological condition that hasn’t yet caused other symptoms. Unlike flat feet, which are common and normal in young children, a noticeably high arch at any age is considered unusual enough to warrant evaluation. When both feet are affected, CMT testing is a reasonable first step. When only one foot shows a high arch, imaging of the spine may be needed to rule out tumors or a tethered cord.
Early identification matters because treating the underlying condition, when one exists, can slow the progression of the foot deformity and reduce the likelihood of needing major reconstructive surgery later.