Foot Care in Diabetes: How Effective Daily Checks Protect Your Feet

Underlying mechanisms

Diabetic foot syndrome arises from a complex interplay of nerve damage and circulatory disorders. Medical professionals generally distinguish between diabetic polyneuropathy and peripheral arterial disease. Affected individuals frequently exhibit mixed forms, which multiply the risk of chronic wounds.

In sensorimotor polyneuropathy, the peripheral nerve fibres degenerate. The sensory component means that temperature differences, tactile touch and, above all, painful stimuli are no longer perceived or are perceived with a severe delay. A small pebble in the shoe, a pressing sock seam or a hot water bottle that is too hot no longer trigger a warning signal in the brain. At the same time, the motor component causes an imbalance in the foot muscles. The short foot muscles atrophy, leading to deformities such as hammer toes or claw toes. As a result, body weight shifts during walking onto small bony prominences beneath the foot that are not designed for this load.

Additionally, autonomic neuropathy impairs sweat gland regulation. The skin on the foot releases hardly any moisture, becoming extremely dry, brittle and losing its elasticity. Deep skin cracks develop, known as rhagades, which serve as an entry point for bacteria. If the microcirculation or major arteries are simultaneously narrowed due to arteriosclerosis, insufficient oxygenated blood reaches the tissue. Small wounds no longer heal because the body cannot transport the required nutrients and immune cells to the site of injury.

Typical signs

The initial changes to the feet often announce themselves subtly. In the early stages, affected individuals report a tingling sensation reminiscent of crawling ants or burning dysaesthesia that increases particularly in the evening hours. A striking phenomenon is the feeling of walking on cotton wool or a thick layer of rubber. Normal perception of the ground beneath is lost.

Visible signs of risk include unusual calluses at points of high pressure. Hemorrhages or cavities often form unnoticed beneath these hyperkeratoses, representing a precursor to malum perforans, a deep diabetic ulcer. Changes in skin colour also deserve attention. Pale, cool skin points to circulatory disorders, whereas a reddish blue discolouration or localized heat may indicate inflammatory processes or bone remodeling.

These signs must be distinguished from purely venous complaints, where swollen ankles and congestion-related skin changes are usually predominant. Fungal infections of the skin and nails also occur more frequently in people with diabetes. Athlete's foot manifests as scaling and maceration between the toes, whereas nail fungus leads to thickened, crumbly and yellowish discoloured nail plates. Both infections significantly weaken the barrier function of the skin.

Everyday causes

Injuries in the home environment rarely result from major accidents. Most often, careless behaviours or unsuitable everyday items cause damage. Improper footwear ranks as the leading trigger. Many affected individuals purchase shoes that are too small or too narrow because reduced sensation causes the foot to falsely report that the shoe fits well. In reality, the upper material squeezes the toes together, generating blisters or friction on the toe joints.

Mistakes in nail and skin care represent another risk. Using sharp metal instruments such as nail scissors, clippers, blades or callus razors quickly leads to cuts in the sensitive nail folds. The use of callus rasps or pumice stones also frequently creates microscopic tears through which germs penetrate. Over-the-counter corn plasters or tinctures contain salicylic acid. This acid does not distinguish between dead callus and healthy skin. In diabetic neuropathy, it regularly leads to extensive chemical burns of the tissue.

Thermal damage frequently occurs due to foot baths that are too hot. Anyone who can no longer check the water temperature with their foot due to a lack of thermal sensation and foregoes a thermometer quickly suffers second-degree burns. Similarly, walking barefoot in the garden or on carpeted floors represents a source of danger. Pins hidden in carpet fibres, small glass splinters or sharp wooden edges penetrate the plantar soft tissue layer effortlessly.

When medical evaluation is necessary

A diabetic foot requires a strict division of responsibilities. As soon as skin integrity is breached, home care ends. Every wound, blister or cutaneous haemorrhage, no matter how small, must be presented immediately to a general practitioner, diabetologist or specialized foot clinic. Warning signs of an acute infection include:

• Increasing redness spreading around a site.
• Localized warming of the skin compared to the healthy foot.
• Swelling on the dorsum of the foot or around the ankles.
• Discharge of wound fluid, pus or a noticeable unpleasant odour.
• Sudden skin discolouration turning dark red, purple or black.

If systemic signs such as fever, chills or an unexplained deterioration in blood sugar levels also occur, it is a medical emergency. Delays in presenting to a specialist practice can lead to the progression of tissue necrosis within a few days. Timely evaluation protects against protracted hospital stays or surgical procedures.

What podiatric treatment can achieve

Medical foot care differs fundamentally from cosmetic treatments. In a specialized practice, a thorough inspection of the overall condition takes place before every treatment unit. The musculoskeletal system, vascular status and sensitivity are checked in a structured manner. To assess nerve function, the practice uses scientifically recognized test procedures such as the 10-gram Semmes-Weinstein monofilament to test pressure sensation and the Rydel-Seiffer tuning fork to measure vibration perception.

As part of a podologische Komplexbehandlung (comprehensive podiatric treatment), excessive callus layers are removed painlessly and bloodlessly using scalpel-like instruments or rotating diamond burs. Treatment takes place under continuous cooling or suction to prevent any heat generation on the tissue. Ingrown or thickened nails are professionally shortened and shaped without injuring the tissue in the nail fold area. If nail changes exert continuous pressure, customized nail brace systems can gently correct the nail.

Treatment intervals depend on the patient's individual risk category. For existing neuropathy without deformities, intervals of four to six weeks are customary. If deformities or circulatory disorders are already present, shorter intervals may be necessary. As a sektorale Heilpraktikerin für Podologie (sectoral naturopathic practitioner for podiatry), it is possible in certain situations to independently diagnose findings and create targeted therapeutic plans. All instruments are subject to the strictest hygiene regulations and are thermally sterilized after every patient to rule out the transmission of infections.

What you can do yourself

Daily self-inspection takes only a few minutes, but must be carried out with great discipline. Choose a fixed time in your daily routine, for example in the morning after getting up or in the evening before going to bed. Ensure excellent lighting in the room.

Use the following routine for your check:

1. First look at the dorsum of the foot, the nail folds and the tips of the toes from above.
2. Gently spread the toes apart and check each interdigital space for moisture, redness or white, softened areas of skin.
3. Examine the sole of the foot and the heel. If you cannot bend down far enough, use an unbreakable hand mirror with a telescopic handle or place the mirror on the floor.
4. Gently stroke the entire sole of the foot with the flat of your hand to feel for bumps, rough areas or embedded foreign bodies.
5. Feel the complete inside of each shoe with your hand before putting it on to check for small stones, grains of sand or folded insoles.

Feet should be cleaned daily with lukewarm water. Always check the water temperature with a bath thermometer or your forearm. The bath must last no longer than three minutes, as the skin will otherwise soften and lose its protective barrier. Use mild, soap-free washing lotions. After washing, the feet must be dried thoroughly. Take particular care to gently pat dry the spaces between the toes without rubbing.

Special creams or foam creams with a urea content of 5 to 10 percent are suitable for subsequent care. Urea binds moisture in the stratum corneum and keeps the skin supple. Apply the care product thinly to the dorsum and sole of the foot. The spaces between the toes must be left out, as remaining cream residues there create a moist environment that favours the development of fungal infections.

Footwear must offer sufficient space for the toes. When buying socks, choose soft, natural materials such as cotton or merino wool without pressing seams in the toe area. Avoid socks with tight elastic bands, as these can constrict venous return. Never walk around the house in socks or barefoot: always wear sturdy slippers with a closed heel and non-slip sole.

Common mistakes

In practice, recurring behavioral patterns that lead to complications are seen time and again. Awareness of these mistakes helps patients review their own habits critically.

The most common behavioural errors include:

• Walking barefoot on warm sand, tiles or carpets despite reduced pain perception.
• Using sharp, pointed tools to remove calluses or cut toenails.
• Cutting the corners of the nails deep into the lateral nail wall, which leads to ingrown nails.
• Using hot water bottles, grain pillows or radiant heaters on the feet to compensate for feelings of coldness.
• Using over-the-counter chemical remedies for corns or calluses.

Another serious error is overlooking sock seams. Many commercial socks have thick transverse seams across the tips of the toes. Under shoe pressure, these seams act like small blades on sensitive skin. Turn such socks inside out before putting them on if seamless diabetic socks are unavailable.

Ignoring moist areas between the toes is also frequently observed. When the skin there swells and turns whitish, this is known as maceration. This softened skin is extremely vulnerable to cracks and fungal colonization. Instead of applying cream, this area must be kept dry and, if necessary, ventilated by inserting specialized medical fleece strips.

Current evidence and scientific context

The importance of structured preventive measures in diabetes mellitus is documented by extensive international studies. Guidelines from the International Working Group on the Diabetic Foot (IWGDF) emphasize that combining regular professional foot care, adequate footwear provision and daily self-inspection can reduce the risk of foot ulcer development by up to 50 percent [1].

Studies demonstrate that loss of protective sensation is the single strongest factor for the occurrence of tissue damage [2]. As soon as patients no longer perceive pain, the natural adaptive reflex in gait pattern is absent. Scientific work on biomechanics confirms that altered pressure peaks beneath the metatarsal heads without protective footwear inevitably lead to tissue necrosis in the deep layers of the sole [3].

Care data from Germany confirm that continuous podiatric care significantly reduces hospitalisation rates and amputation figures in high-risk patients [4]. Adherence to strict hygiene standards as well as interdisciplinary collaboration between podiatrists, diabetologists and orthopaedic shoe technicians form the backbone of successful limb preservation [5].

Treatment in Memmingen

In the modern practice premises of FREITAG® Podologie GmbH at Kempterstr. 25 in Memmingen, the focus is on the prevention and treatment of diabetic foot changes. The catchment area extends across the entire Unterallgäu, the Allgäu region and parts of Upper Swabia. Affected patients receive sound care tailored to their individual needs here.

Through qualification as a sectoral naturopathic practitioner for podiatry and many years of experience in medical foot care, the practice provides a reliable point of contact for people with diabetes mellitus. Timely appointment booking enables the creation of a tailored care and monitoring plan to safeguard the health of your feet in the long term.

Orthopaedic shoe provision and pressure relief

The transition from regular footwear to specialized protective shoes is a central component of secondary prevention. Standard off-the-shelf shoes rarely provide the internal volume required to effectively cushion pressure peaks at the metatarsal heads or toe joints. In manifest neuropathy, soft padding is insufficient: a targeted static and dynamic redistribution of pressure is required using custom orthopaedic shoes or therapeutic footwear with diabetes-adapted footbeds. These insoles consist of multilayered synthetic foams of varying Shore hardness levels, usually a combination of ethylene-vinyl acetate foams and viscoelastic materials.

Comparative pressure measurement, known as electronic pedobarography, precisely reveals localized peak loads within the gait pattern. Based on these data, the orthopaedic shoe technician fabricates an insole with specific reliefs and metatarsal pads. Rigid sole stiffening combined with a toe roller or butterfly roller reduces bending stress on the metatarsophalangeal joints during toe-off by up to 40 percent. A case from practice illustrates this necessity: a 64-year-old patient, Mr H., wore sturdy hiking boots one size too small for years to feel greater stability. The result was a deep pressure ulcer beneath the second metatarsal head. Only transitioning to an orthopaedic protective shoe with an extra-deep toe cap and custom cushioning led to complete wound healing after twelve weeks.

Strict geometric requirements apply when designing footwear. The interior space must be at least 10 to 15 millimetres longer than the weight-bearing foot when standing. All internal seams must be absent or padded. Adjustable hook-and-loop or lacing systems allow continuous adjustment to changing foot volumes, such as evening fluid retention in tissue.

Modern wound management for diabetic ulcers

If skin integrity is breached despite all precautions, the principle of phase-adapted moist wound healing takes effect. Dry dressing changes with simple compresses belong to the past, as removing them tears and damages regenerating epithelial tissue. Modern wound management utilizes hydroactive wound dressings that create a moist microclimate for cell proliferation. Alginates from brown algae absorb excess exudate and form a gel-like protective cushion. Hydrocolloids and polymer foams keep the wound supple and protect against external mechanical stress.

Before covering the wound, thorough wound cleaning, known as debridement, takes place. The podiatrist or treating physician removes fibrinous slough, necrotic tissue and hyperkeratotic wound margins. This is performed mechanically using a scalpel or sharp curette. In sensitive or deeply fissured wound cavities, enzymatic preparations or biological methods such as sterile blowfly larvae of the species Lucilia sericata are used. The larvae secrete digestive juices that liquefy non-viable tissue exclusively, leaving healthy structures intact.

Offloading the affected zone has absolute priority in the healing process. Without complete pressure relief, even the most advanced wound dressing cannot achieve tissue regeneration. Specialized offloading shoes with a shortened sole, known as forefoot offloading shoes, or removable orthotic systems such as the Total Contact Cast are used. In a 72-year-old female diabetic patient with a heel lesion, consistent immobilization in a custom-made offloading orthosis finally achieved closure of the wound surface after months of stagnation.

Impact of metabolic control and lifestyle

The biochemical foundation for healthy blood vessels and nerves lies in permanently stable glucose control. Chronically elevated blood sugar levels lead to irreversible cross-linking of collagen fibres in vascular walls via the formation of advanced glycation end-products, known as AGEs. The target HbA1c level for most adult diabetics is below 7.0 percent or 53 mmol/mol, but must be individually adjusted for age, comorbidities and hypoglycaemia risk. Severe fluctuations in blood glucose levels damage the delicate capillaries supplying the nerves just as much as persistently elevated levels.

Smoking cessation represents the single most effective measure to slow the progression of peripheral arterial disease. Inhaling tobacco smoke causes immediate constriction of the smallest arterioles for several hours, significantly reducing local tissue perfusion. When affected individuals stop smoking, tissue oxygen saturation improves within a few weeks, directly boosting cellular wound healing capacity.

A tailored exercise program promotes collateral vessel formation in the legs. Provided the skin surface is intact and there are no acute ulcers, structured walking training is the intervention of choice for Fontaine stage II PAD. Affected individuals complete intervals several times a week on a treadmill or during brisk walking up to just below the pain threshold. If pronounced sensory neuropathy is already present, high-impact sports must be replaced by joint-sparing alternatives such as stationary cycling or aqua gymnastics to avoid microtrauma to the soles of the feet.