Atopic Eczema on the Feet: Itching, Cracks, and Proper Basic Care

What lies behind it

Atopic dermatitis, commonly known as eczema or neurodermatitis, is a chronic inflammatory, non-contagious dermatosis. On the feet, this condition manifests in a particularly stressed region of the body. The physiological cause lies in a complex disruption of the epidermal barrier function, which is usually partially genetic in origin. The protein filaggrin plays a central role here, being responsible for linking keratin fibres within the corneocytes. If a filaggrin deficiency is present, the outermost layer of the skin, the stratum corneum, loses its structural integrity.

The stratum corneum can be conceptualised as a brick wall. Corneocytes form the bricks, while a complex mixture of ceramides, free fatty acids and cholesterol represents the stabilising mortar. If these lipids are lacking or their synthesis is impaired, moisture continuously escapes from the deeper layers of the skin. Medical professionals refer to this as increased transepidermal water loss. At the same time, allergens, chemicals and pathogens can easily penetrate the skin.

An anatomical feature exists on the sole of the foot. The skin here lacks sebaceous glands, which normally produce a protective lipid film. Moisture supply to the sole of the foot therefore depends exclusively on eccrine sweat glands and intracellular NMF, the natural moisturising factors. If the epidermal barrier collapses due to atopic dermatitis, the skin of the feet reacts with extreme sensitivity to mechanical shear and pressure forces, such as those occurring during walking and standing. The immune system responds with an exaggerated T-cell-mediated inflammatory reaction, which sets off the typical vicious circle of pruritus, erythema and scaling.

Typical signs

Atopic dermatitis on the feet presents a diverse clinical picture that varies depending on age and disease phase. Typical is pronounced xerosis cutis, an extremely dry, coarsely scaling skin that appears dull. Painful rhagades frequently form in the heel area and along the margins of the foot. These linear skin fissures often extend into the upper dermis and bleed under load. Lichenification, a coarsening of the skin markings in response to chronic rubbing and scratching, is also frequently observed on the balls of the feet and the heels.

Another characteristic presentation is dyshidrotic foot eczema, also known as pompholyx. In this condition, pinhead-sized, tense, fluid-filled vesicles form on the lateral surfaces of the toes, over the metatarsals or in the plantar arch. These vesicles are accompanied by intense, burning pruritus. Rupturing vesicle contents lead to weeping skin areas, which subsequently dry into crusts and tear painfully.

For an accurate diagnosis, differentiation from other skin conditions is essential:

• Tinea pedis (athlete's foot): Primarily affects the interdigital spaces, usually displays an asymmetrical distribution and can be distinguished from atopic dermatitis by microscopic or mycological detection of the pathogen.
• Palmoplantar psoriasis: Displays sharply demarcated, reddish plaques with silvery-white scaling, which is often also accompanied by nail pitting on the toenails.
• Allergic contact dermatitis: Often occurs focally as a reaction to specific ingredients in shoe leather materials, tanning agents, adhesives or dyes, and improves after elimination of the trigger.

A patient in our practice reported months of unsuccessful self-treatment with antifungal creams. Only precise differential diagnostic evaluation revealed atopic foot eczema, which had been significantly exacerbated by incorrectly chosen, drying antifungal agents.

Everyday triggers

Various everyday factors can trigger flare-ups of atopic dermatitis on the feet or abruptly worsen existing symptoms. The microclimate inside footwear ranks first among these factors. Foot sweat accumulates in airtight shoes made of synthetic materials or polyurethane. The trapped moisture softens the stratum corneum, a process known as maceration. The softened skin loses its remaining protective function, allowing salts from sweat to directly irritate nerve endings and trigger intense pruritus.

Mechanical influences also play a substantial role. Poorly fitting footwear leads to friction and pressure peaks on the balls of the toes or the heel. In healthy skin, the body reacts by forming calluses. In atopic skin, however, mechanical stress rapidly leads to tissue tears and inflammatory eczema foci. Deformities of the foot, such as splayfoot or flat foot (pes plano-valgus), also alter pressure distribution and excessively strain already compromised skin areas.

Skincare mistakes at home often unintentionally compound the problem. Frequent, hot foot baths strip essential lipids from the epidermis. The use of strongly alkaline soaps or shower gels with aggressive surfactants destroys the skin's natural protective acid mantle, whose pH value normally lies in the slightly acidic range around 5.5. During the winter months in the Allgäu and Upper Swabia regions, the change between cold outside air and dry indoor heating air also leads to a rapid drop in skin moisture.

When medical evaluation is required

Atopic dermatitis on the feet requires dermatological assessment at regular intervals. Immediate medical evaluation is imperative if signs of a secondary bacterial infection appear. Due to the compromised skin barrier, the pathogen Staphylococcus aureus can easily proliferate. This manifests as yellowish, honey-like crust deposits, increasing local heat, widespread erythema, pus formation or sharp pain exceeding the extent of the visible fissures.

A sudden spread of painful, punched-out vesicles is also a warning signal, which may indicate an infection with herpes simplex viruses. This so-called eczema herpeticum represents a medical emergency. Likewise, deep, bleeding rhagades that fail to heal after two weeks despite consistent care should be examined medically to rule out concomitant conditions such as circulatory disorders or peripheral neuropathy.

If systemic signs of inflammation such as fever, chills or red streaks ascending along the lymphatic vessels of the lower leg develop, an emergency clinic or hospital must be consulted immediately. Dermatological medication with topical glucocorticoids or calcineurin inhibitors must always be prescribed and monitored by a specialist physician.

What podiatric treatment can achieve

Medical foot care serves an important bridging function between dermatological therapy and daily home care in the management of patients with atopic foot eczema. In our podiatry practice, intervention begins with a thorough inspection of the skin and nails, taking into account individual stress factors. You can find out more about our range of services at /en/services.

An essential component of podiatric treatment is the sterile debridement of excessive, inelastic hyperkeratoses at the edges of rhagades. When hardened callus margins act as a lever with every step, the healthy tissue deep underneath repeatedly tears open. Using scalpel-like instruments and specialised diamond burs, we precisely remove these tension margins without trauma. As a result, the wound fissure closes substantially faster, and pressure pain subsides.

In inflammatory skin conditions, absolute gentleness is required. Manicures and pedicures with sharp household tools carry an enormous risk of injury. As part of the treatment, we ensure sterile instrument reprocessing and use physiological care lotions that are free from fragrances and preservatives. If skin changes lead to pressure discomfort between the toes, individually crafted silicone orthoses can provide relief. For treatment planning in uncertain findings or for recommending specific podiatric measures, our expertise as a sectoral non-medical practitioner (sektorale Heilpraktikerin) is available to you at /en/sectoral-practitioner.

Should pruritus be particularly acute due to inflammatory processes, targeted cooling measures can be used. In addition to the podiatric treatment plan, visiting our cryotherapy chamber at /en/cryotherapy can be an option by agreement to calm the body's inflammatory processes and alleviate pruritus through thermal stimuli. Podiatric treatment intervals are individually tailored and usually range between three and six weeks, depending on the stability of the skin barrier.

What you can do yourself

Basic home care is the foundation of any successful therapy for atopic dermatitis on the feet. The primary goal is to replenish lost moisture and lipids to the skin. The choice of skincare product must be adapted to the current skin condition. Dry, scaling skin requires water-in-oil (W/O) emulsions, which leave a light protective film. During acute, weeping flare-ups, however, light oil-in-water (O/W) emulsions or moist compresses are preferable to prevent heat accumulation.

Ingredients such as urea bind moisture in the skin. In the presence of open fissures, however, urea can cause a burning sensation. During such phases, the use of products containing glycerine, ceramides, licochalcone A or microsilver is recommended. Microsilver has a gentle antimicrobial effect and helps stabilise the natural skin flora without inducing pathogen resistance.

The daily routine includes the following measures:

1. Wash the feet only briefly each day with lukewarm water and a soap-free, lipid-replenishing syndet with a slightly acidic pH value.
2. Gently pat the skin dry after washing with a soft towel instead of rubbing, making sure not to omit the interdigital spaces between the toes.
3. Apply the appropriate basic care immediately after drying while the skin still retains residual moisture.
4. Wear socks made of natural, unbleached cotton, merino wool or bamboo fibre that do not have constricting cuffs and can be washed at a minimum of 60 °C.
5. Air out worn shoes for at least 24 hours and use wooden shoe trees to effectively draw out residual moisture.

When buying shoes, look for soft, untanned or vegetable-tanned leather. Avoid internal seams that could rub against affected areas. Flexible soles support the natural roll-through motion of the foot and reduce localized shear forces on the heels and balls of the feet.

Common mistakes

In clinical practice, we regularly observe well-intentioned care measures that actually worsen the skin condition. The use of callus rasps, pumice stones or even blades from drugstores is counterproductive in atopic dermatitis. Rubbing creates microscopic cuts and inflammatory stimuli that stimulate the epidermis to produce increased, irregular callus formation. Tearing off dry skin shreds opens deeper skin layers to pathogens.

Another mistake is prolonged foot soaking in hot water with unsuitable additives such as harsh chamomile concentrates or curd soap. Hot tubs and long baths strip the skin of its remaining structural lipids. Chamomile also possesses high allergenic potential, which can rapidly lead to contact sensitisation in individuals with atopic dermatitis.

You should strictly avoid the following practices:

1. Use of heavily fragranced body lotions, as fragrances and additives can flare up eczema foci.
2. Continuous wearing of waterproof rubber boots or safety footwear without regular sock changes during daily work.
3. Unilateral, uncontrolled cessation or long-term application of prescribed cortisone-containing ointments without medical tapering schedules.
4. Applying pure layers of milking grease or petroleum jelly to dry skin without prior moisture application, as these pure occlusive agents seal the skin and can cause heat accumulation.

Evidence base and assessment

Dermatological research confirms the paramount importance of continuous barrier restoration in atopic dermatitis. The S3 guideline on the treatment of atopic dermatitis emphasizes that the consistent application of basic care products significantly reduces the frequency and intensity of acute flare-ups [1]. Investigations into the skin barrier show that lipid-rich emulsions with a physiological ratio of ceramides, cholesterol and free fatty acids accelerate epidermal regeneration and measurably reduce transepidermal water loss [2].

Clinical studies on the topical application of microsilver demonstrate a reduction in colonization density with Staphylococcus aureus on atopic skin, leading to a marked decrease in inflammatory parameters and pruritus [3]. The influence of shoe climate on skin physiology is also well documented scientifically. Studies in subjects with foot eczema showed that reducing relative humidity and temperature inside the shoe measurably stabilizes the barrier function of the sole of the foot within a few weeks [4].

Regarding complementary physical therapies, work on cold therapy shows that brief thermal stimuli can inhibit the transmission of itch signals via unmyelinated C-nerve fibres in the spinal cord, providing patients with short-term symptom relief [5]. The combination of medical care, mechanical offloading and topical dermatological therapy reflects the current scientific consensus.

Treatment in Memmingen

At our practice FREITAG® Podologie GmbH at Kempterstr. 25 in Memmingen, we care for patients from Memmingen, the Unterallgäu and Upper Swabia. Our specialist staff is trained to treat sensitive feet damaged by atopic dermatitis gently and according to the latest hygienic and medical standards. You can find further insights into our practice routines at /en/practice.

We work closely with treating dermatologists in the region to ensure seamless care between medical therapy and professional foot care. If you suffer from dry, itchy foot eczema or painful fissures, please feel free to arrange an appointment for an assessment and specialist consultation. Simply use our contact options at /en/contact.

Juvenile plantar dermatosis

A special form of atopic foot eczema predominantly affects children and adolescents between three and fourteen years of age. Juvenile plantar dermatosis, also referred to in medical literature as atopic winter foot, differs clinically from classic adult eczema. The condition is characterised by shiny, reddened skin with a glazed appearance on weight-bearing areas of the forefoot and the undersides of the toes. Typically, the interdigital spaces and the arch of the foot are completely spared from these changes.

The cause is an interplay of a skin barrier that is not yet fully mature, increased perspiration during youth sports, and the microclimate inside modern athletic footwear. The constant cycle between moisture inside the shoe and sudden drying after removal leads to pronounced tension damage. The skin loses its elasticity and splits in the form of painful transverse fissures on the tips of the toes and the ball of the foot.

A twelve-year-old female patient from the Unterallgäu district presented to our practice whose forefeet had widespread cracking following intensive use of synthetic indoor sports shoes. After switching to breathable footwear, consistently applying zinc- and lipid-containing pastes, and adjusting sock materials, the deep fissures healed within four weeks. Differentiation from tinea pedis infection is essential in this age group, as antifungal agents additionally irritate delicate pediatric skin.

Neurobiological mechanisms of pruritus

Pruritus in atopic dermatitis on the feet represents the most distressing manifestation for affected individuals. Unlike in acute allergic reactions, this pruritus is not primarily mediated by histamine. Classic antihistamines therefore frequently show limited efficacy in this condition. Instead, inflammatory mediators such as interleukin-31, substance P and neuropeptides activate unmyelinated C-nerve fibres in the dermis. Endogenous proteinases also activate protease-activated receptors of type 2, abbreviated PAR-2, triggering an intensely burning sensation of itch.

Mechanical scratching produces a brief pain stimulus. This temporarily overrides the itch signal in the spinal cord, but leads to massive tissue damage. Scratching destroys remaining cellular connections in the stratum corneum and releases further cytokines. A vicious circle of tissue trauma, heightened inflammation and intensified pruritus ensues, which can ultimately lead to central sensitisation of the nervous system. The skin then reacts with severe itching even to minimal thermal or mechanical stimuli.

To break this pattern, behavioural therapy approaches and tactile substitute stimuli have proven effective. Instead of damaging fingernail scratching, targeted pressure with the heel of the hand can be applied to the affected area. Cooling the skin areas using moist compresses or using specialized textiles also temporarily halts nerve fibre signal transmission. To prevent unconscious scratching at night, wearing thin cotton gloves during sleep is recommended.

Textile and material science in prevention

The choice of textiles and materials in direct contact with the skin of the feet significantly influences the course of the condition. Conventional cotton socks absorb moisture well, but release it into the surrounding environment very slowly. The fabric remains damp, macerates the stratum corneum and increases the coefficient of friction on the skin. Performance fibres made of merino wool or bamboo viscose, on the other hand, possess the property of efficiently wicking moisture away from the skin surface to the outside without losing their thermal insulating properties.

Threads embedded with silver or chitosan particles represent a significant development in medical textiles. Silver ions are released in small amounts by foot sweat and inactivate bacterial membrane enzymes. Consequently, colonization with Staphylococcus aureus on affected foot areas is significantly reduced. Chitosan, a polysaccharide derived from biopolymers, binds moisture and additionally exerts a soothing effect on inflamed tissue.

In footwear selection, the chemical tanning of leather plays a crucial role. Chromium VI compounds used in conventional leather processing are among the most common triggers of contact allergies on atopic skin. Sweat dissolves these chromate salts from the shoe lining, which can drastically worsen the presentation of atopic foot eczema. For individuals with atopic dermatitis, investing in vegetable-tanned, chromium-free leather and shoes with certified high water vapour permeability is therefore recommended.