Pes Cavus: High Peak Loads and Effective Relief Options

What lies behind it

A healthy foot rests on three essential support points when standing: the calcaneus, the metatarsophalangeal joint of the hallux, and the metatarsophalangeal joint of the fifth toe. This structure forms the longitudinal and transverse arches, which cushion shocks and distribute body weight evenly. In high arch, medically known as pes cavus, the longitudinal arch is markedly elevated. The midfoot partially or completely loses contact with the ground. Consequently, the total contact area of the sole decreases drastically from an average of around 80 square centimetres to often less than 30 square centimetres.

According to physical laws, this drastic reduction in the supporting surface leads to an extreme concentration of force. Almost the entire body weight rests exclusively on the heel and metatarsal heads I and V, namely the ball areas under the big and little toes. Instead of a smooth roll-through motion, the foot strikes the ground like a rigid stamp with every step. The cushioning effect of the plantar aponeurosis, the broad tendinous sheet on the sole of the foot, is largely lost, as this tissue structure is under continuous, extreme tension and is markedly shortened.

In many cases, pes cavus is accompanied by a mild to pronounced supination position in the subtalar joint. The foot tilts outwards. This leads to additional overload on the outer margin of the foot and impairs stability during gait. The talocrural joint attempts to compensate for this malalignment, resulting in strain on the surrounding ligaments and tendons. In particular, the tendons of the peroneus longus and tibialis anterior muscles become imbalanced. Pes cavus is therefore by no means merely a local foot problem, but affects the entire kinetic chain from the knee and hip joints up to the lumbar spine.

Biomechanically, a distinction is made between a flexible and a rigid pes cavus. In the flexible form, the arch can still be manually corrected or flattened under passive loading or targeted manipulation. In the rigid form, by contrast, the bony and ligamentous structures are so consolidated that correction is no longer possible without surgical intervention. This distinction is fundamental for podiatric practice, as it determines the extent of mechanical offloading required.

Typical signs

The most striking feature of a high arch is the extremely high instep. Affected individuals frequently report that lace-up shoes exert painful pressure on the instep, or that slip-on shoes cannot even be put on. However, the most evident signs are left on the sole of the foot in the form of characteristic keratinisation patterns.

Due to peak loading, the skin responds with accelerated cell division in the epidermis. Circumscribed, often very thick hyperkeratoses develop. These callosities are typically circular or oval, located directly beneath the metatarsal heads I and V. While the centre of the sole remains entirely free of calluses and often displays delicate, thin skin, the edges of the heel exhibit deep, sometimes painfully cracked rhagades. This fissure formation occurs when the rigid, thick callus can no longer yield to stretching under heel loading and splits open.

Another typical phenomenon is the development of claw toes or hammer toes. Due to the traction of shortened intrinsic foot muscles and tendons, the toes are hyperextended at the metatarsophalangeal joints, while the interphalangeal joints remain flexed. As a result, the toe tips are pressed forcibly against the ground or the interphalangeal joints rub against the upper shoe lining. Painful corns, known medically as heloma durum, form over the joint lines. Beneath the nail plates, permanent pressure from the shoe toe cap can lead to microtrauma, subungual haematomas, or nail deformities.

An illustrative practical case demonstrates the scope: A 48-year-old field sales representative from the Unterallgäu region complained of burning pain in the ball of the foot, which occurred after just two hours of walking. Examination revealed massive, widespread hyperkeratosis under the first metatarsal head, with a central, deeply embedded corn. In his case, the reduced contact surface had resulted in focal pressure loading that led to chronic tissue irritation without professional pressure relief.

Symptoms can be precisely summarised:

• Pronounced callus plaques beneath the medial and lateral ball of the foot, with an entirely callus-free midfoot arch.
• Painful corns on the dorsal aspects and tips of the toes as a result of claw toe formation.
• Deep heel rhagades at the margins of the heel pad due to lack of elasticity in the hyperkeratotic tissue.
• Persistent burning sensation in the forefoot after short walking distances or prolonged standing.
• Recurrent blistering and pressure points on the high instep caused by tight footwear.

Causes in everyday life

The etiology of pes cavus is multifaceted. In many cases, a genetic predisposition is present. Nevertheless, everyday factors and lifestyle habits play a decisive role in whether a mild arch elevation remains asymptomatic or develops into a painful deformity.

Unsuitable footwear is one of the main accelerators of symptoms. High-heeled shoes shift the entire body weight forwards onto the already overloaded metatarsal heads. Due to the steep angle, the plantar fascia is further approximated and shortened. At the same time, excessively thin, unpadded soles offer no cushioning for the rigid skeletal structure of the foot. Furthermore, if shoes are cut too narrow in the forefoot, the toes are compressed, which drastically accelerates the progression of claw toes.

Another everyday factor is walking continuously on extremely hard, level surfaces such as concrete, asphalt, or tiles. Modern work environments lack natural stimulation for the foot from varied surfaces like grass, sand, or forest floor. The absence of these stimuli causes the intrinsic foot muscles to atrophy, while the large superficial muscles fall into continuous tension. This muscular imbalance progressively worsens the deformity.

Systemic conditions form another foundation for the development of pes cavus. Underlying neurological diseases such as hereditary motor and sensory neuropathy (HMSN, also known as Charcot-Marie-Tooth disease), Friedreich's ataxia, or status post-poliomyelitis lead to an asymmetrical weakness of the lower leg muscles. If the peroneus brevis muscle fails, the stronger tibialis posterior muscle predominates and pulls the foot into a high-arch position. Metabolic diseases such as diabetes mellitus can also insidiously alter foot biomechanics via peripheral neuropathy.

Errors in home foot care frequently exacerbate the problem. Attempting to remove thick callus plaques under the ball of the foot aggressively with rasps or blades triggers a reactive protective mechanism in the skin. The epidermis responds to the mechanical trauma with even faster cell regeneration. The callus layer becomes thicker and less elastic, promoting fissure formation.

When medical assessment is necessary

Pes cavus does not require treatment in every instance, provided it is asymptomatic and remains stable. However, there are clear warning signs that make a thorough specialist examination by an orthopaedic surgeon or neurologist imperative. Early diagnosis can prevent the progression of irreversible tissue damage.

Particular attention is required if the shape of the foot visibly changes within a few months. Rapidly progressive arch elevation almost always indicates an underlying neurological disorder. If accompanied by weakness during foot dorsiflexion or an unsteady gait, neurological investigation must be carried out immediately.

Similarly, sensory disturbances such as tingling, numbness, or reduced pain and temperature sensation in the feet require medical evaluation. These symptoms are typical of polyneuropathy, which, combined with the high peak pressures of pes cavus, presents an extreme risk of tissue necrosis and chronic wounds. In people with diabetes mellitus, an undetected high arch can quickly lead to a neuropathic pressure ulcer.

Furthermore, sudden unilateral deformities must be investigated. While congenital pes cavus is usually bilateral and symmetrical, a unilateral increase in the arch indicates lesions of the spinal cord or nerve roots, or past injuries. Diagnostic imaging using X-ray or magnetic resonance imaging is also essential if persistent resting pain continues despite podiatric offloading and appropriate footwear.

What podiatric treatment can achieve

The podiatry practice serves as a central interface in the management of pes cavus. The primary objective of podiatric treatment is the reduction of peak pressure, the painless debridement of hyperkeratoses, and the protection of vulnerable tissue structures from chronic trauma.

At the start of any sound treatment is a pododynamic assessment. Here, pressure distribution during standing, roll-through mechanics during gait, and the condition of the skin and nails are precisely documented. The practitioner evaluates joint mobility in the ankle and checks whether the condition is a flexible or rigid pes cavus. An individualized treatment plan is formulated on this basis.

The removal of load-induced calluses takes place within the framework of podologische Komplexbehandlung (comprehensive podiatric treatment) using the highest hygiene standards. Using sterile scalpel blades of various shapes, the thickened stratum corneum is removed layer by layer in an atraumatic manner. Precise scalpel technique allows the callus to be reduced exactly to physiological levels without damaging the underlying healthy tissue. The surface is then smoothed using rotating diamond burs. The use of wet spraying technique or integrated dust extraction prevents excessive overheating of the tissue, which is essential for pain patients and individuals with diabetes.

Deep-seated corns, often found under the metatarsal heads or on hammer toes in pes cavus, are painlessly enucleated using specialized gouge blades or round burs. To prevent rapid recurrence at these pressure points, the podiatrist fabricates custom pressure- and friction-relief orthoses. These orthoses are moulded directly on the patient's foot from medical-grade two-component silicone. They ensure that the toes are maintained in a corrected position or that pressure is redistributed across adjacent, less burdened areas. Detailed information on the various treatment options can be found in our services section.

Treatment intervals depend on the individual rate of callus regrowth and the degree of deformity. As a rule, intervals of four to six weeks have proven effective. For practitioners with additional qualifications as a sektorale Heilpraktikerin (sectoral naturopathic practitioner), podiatric therapies can, following thorough diagnosis, also be prescribed and performed independently without a prior medical referral.

What you can do yourself

Alongside professional care in the practice, active self-management plays a crucial role in long-term treatment success. Through targeted everyday measures, affected individuals can help reduce tension in the sole of the foot and maintain skin elasticity.

A key component is daily skin care. Because calloused areas in pes cavus are extremely prone to drying out and cracking, highly effective moisturisers must be used. Products containing 10 to 15 percent urea help soften the stratum corneum and sustainably improve the skin's moisture retention capacity. For deep heel rhagades, targeted application of lipid-rich ointments before bedtime is recommended.

In addition, regular exercises can stretch shortened tendons and muscles. A highly effective exercise is rolling out the sole of the foot with a small fascia ball or fascia roller. The ball is moved back and forth with light to moderate pressure under the foot from the heel to the ball. This massage releases adhesions in the plantar aponeurosis and improves tissue perfusion. Stretching the calf muscles is also essential, as a shortened Achilles tendon exacerbates high arch alignment.

The following approach has proven effective for home routines:

1. Daily visual inspection of the sole and interdigital spaces for pressure points, redness, or minor skin tears.
2. Gentle rolling of the plantar surface with a fascia ball for three to five minutes per foot, preferably in the morning or after physical exertion.
3. Generous application of urea-containing foam cream or lotion to preserve skin elasticity.
4. Consistent avoidance of sharp tools such as callus planes, blades, or coarse pumice stones.
5. Selection of footwear with adequate forefoot volume, soft upper materials, and a cushioning, lightweight rocker sole.

When purchasing shoes, individuals with pes cavus should specifically look for models with a rocker sole or rolling sole. This design mechanically supports the natural roll-through motion of the foot without requiring extreme flexion of the metatarsal heads. A removable insole is also important so that custom orthotic insoles can be accommodated easily.

Common errors

When dealing with typical symptoms of pes cavus, serious mistakes are frequently made due to lack of awareness, which can aggravate symptoms or lead to secondary damage.

The most widespread mistake is self-treatment of calluses and corns using over-the-counter corn plasters or aggressive peeling agents. These products usually contain high concentrations of salicylic acid. Because the acid does not distinguish between hyperkeratotic and healthy skin, pressure often causes it to migrate into surrounding tissue. This results in chemical burns, painful inflammation, and frequently deep ulcerations. Particularly in people with diabetes or circulatory disorders, such plasters can have catastrophic consequences.

Another misconception concerns the choice of insoles. Many affected individuals buy soft, unshaped over-the-counter gel insoles hoping for cushioning. While these pads temporarily reduce pressure pain, they provide no biomechanical guidance to the foot. Because pes cavus predisposes to ankle instability, overly soft soles can even increase the risk of sprains. A high arch requires a custom-fitted, supportive orthotic insole with targeted relief or soft padding beneath the loaded metatarsal heads and heel stabilization.

Ignoring early pressure points is equally critical. Redness over the interphalangeal joints or mild burning under the ball of the foot is often dismissed as a temporary inconvenience. However, as skin degrades rapidly under persistent load, a deep, externally invisible haematoma or bursitis frequently forms beneath the callus. Seeking treatment only when pain becomes unbearable significantly prolongs recovery time.

Finally, inappropriate footwear is often maintained. Favourite shoes that are visually appealing but far too narrow or rigid continue to be worn despite a known deformity. The desire for aesthetic footwear often conflicts with biomechanical necessity. Realising that pes cavus requires space and cushioning is, however, a fundamental prerequisite for becoming pain-free.

Current scientific evidence

Scientific research into the biomechanics of pes cavus over the last two decades has clearly demonstrated how profoundly altered pressure distribution affects the entire musculoskeletal system. Studies using plantar pressure measurement (pedobarography) show that peak pressure values under the metatarsal heads in pes cavus patients can be elevated by up to 200 percent compared to healthy control groups [1]. These extreme pressure peaks explain the frequent occurrence of metatarsal stress fractures and chronic metatarsalgia.

Studies on the efficacy of podiatric interventions and orthotic insoles emphasize the necessity of combined therapy [2]. Regular professional debridement, meaning the expert removal of hyperkeratoses, leads to an immediate, significant reduction in local peak pressures. The skin loses its rigid buffering effect, allowing pressure to be redistributed more evenly across underlying adipose tissue.

Researchers have also shown that stiffness of the longitudinal arch severely restricts the foot's ability to pronate during the landing phase of gait [3]. The lack of pronation prevents natural shock absorption, causing impact energy to be transmitted unattenuated to proximal joints. This explains the high coincidence of pes cavus with premature degenerative changes in the knee joint and lumbar facet joints [4].

Modern therapeutic approaches therefore focus not solely on mechanical offloading, but on combining podiatric skin and nail care, custom orthosis fabrication, and targeted physiotherapy [5]. Research confirms that isolated single interventions are significantly less effective in the long term than an interdisciplinary treatment concept.

Treatment in Memmingen

For individuals in Allgäu and surrounding regions, FREITAG® Podologie GmbH at Kempterstr. 25 in Memmingen provides qualified care. The catchment area extends across the entire Unterallgäu region to Upper Swabia. Under the professional direction of Helga Maria Freitag, patients with complex foot deformities receive individualized care.

In the practice, sound expertise, modern instrumentation, and strict hygiene standards come together. In addition to standard comprehensive podiatric treatment, specialized procedures are used to alleviate pain and restore skin health. Appointments can be made directly to develop tailored pressure relief. An overview of the practice concept and facilities is available on the about me page and in the practice section. For direct appointment scheduling, please visit the contact page.