Supporting healthy feet in children: Growth, footwear choice and podiatry

What lies behind it

A child's foot is not merely a scaled-down version of an adult foot. At birth, the skeleton of the tarsus and metatarsus consists predominantly of cartilaginous structures. These are flexible, malleable and not yet fully ossified. The process of ossification, the conversion of cartilage tissue into solid bone, extends throughout childhood and adolescence. Only between the ages of sixteen and eighteen do the epiphyseal plates close completely, giving the skeleton its final stability.

In toddlers, the arch of the foot is concealed under a thick, physiological fat pad on the sole. This pad protects the sensitive cartilaginous structures during the first attempts at walking and gives the foot a flat appearance. As a result, a flat foot is often mistakenly suspected in many children, even though this is merely a normal developmental stage. As the body increasingly uprights itself, through walking on uneven ground and engaging the lower leg muscles, this fatty tissue gradually recedes. The longitudinal and transverse arches build up systematically.

Growth in length is not linear, but occurs in growth spurts. In toddlers between one and three years of age, feet grow by an average of up to 1.5 millimetres per month. This corresponds to approximately three shoe sizes within a single year. Between the ages of three and six, this increase slows down to around one millimetre per month. From six years onwards, growth is usually around 0.5 to 0.8 millimetres monthly. Because this growth occurs in bursts, a shoe that fits properly can become too small within just a few weeks.

Another specific feature concerns proprioception and neurology. Receptors in the soles of the feet and tendons transmit feedback to the central nervous system to control balance. If the foot is permanently squeezed into rigid footwear, this sensorimotor function deteriorates. Furthermore, nerve pathways trigger hardly any pain signals when pressure is applied to cartilaginous tissue. The toes evade the resistance, claw, or overlap. Adaptive tissue changes occur, which often remain unnoticed for a long time without external monitoring.

Typical signs

Parents often ask how they can recognize abnormal developments or ill-fitting footwear. Since children rarely complain of pain, visual and functional markers must be used. After removing shoes and socks, the skin provides initial clues. Clear redness on the toe pads, the proximal interphalangeal joints, or the outer edges of the foot is a distinct indication of mechanical pressure.

An altered gait represents an important warning sign. If the child suddenly starts limping, drags a leg, or noticeably walks on tiptoe, they may be trying to avoid pressure pain. Increased inward turning of the toes, medically known as pes adductus or antetorsion syndrome, should be monitored. An extreme inward tilting of the heel bone, known as calcaneovalgus or flexible flatfoot, also frequently manifests in the gait through a collapsing inner ankle.

The wear pattern on shoes provides valuable diagnostic information. Examine the outer sole of worn children's shoes on a flat surface. Even wear in the area of the ball of the foot and the outer heel is normal. However, if the sole is severely worn on the inner side or the upper appears pressed inwards, a static misalignment is present. The same applies if the toe box, when viewed from above, shows distinct bulges caused by the big toe or little toe.

A distinction must be made between physiological developmental delays and genuine pathologies. Flexible inward rolling of the foot in toddlerhood is harmless in most cases. If the unloaded foot can be moved manually in all directions without pain and the arch rises during tip-toe standing, this usually indicates a functional developmental phase. However, if the foot remains completely flat even when standing on tiptoe or cannot be corrected manually, medical specialists refer to a rigid deformity that requires immediate evaluation.

Everyday causes

The main cause of acquired foot deformities in childhood is wearing shoes that are too short or incorrectly shaped. International studies regularly demonstrate that more than half of all pre-school children wear shoes that are too small. The reason for this usually lies in incorrect measurements prior to purchase or the erroneous assumption that shoe sizes are standardized. In practice, the shoe size stated on the box rarely matches the actual internal length of the shoe.

A widespread contributing factor is tight or synthetic socks. Socks that compress the toes due to high elastane content or undersized sizing act like a constant restraint. They pull the pulp of the big toe inwards and encourage the development of hallux valgus even during childhood. Wearing tights with a foot section that is too tight also leads to functional restriction of the toe extensors over time.

Introducing rigid footwear too early presents another problem. When infants or crawling children wear sturdy shoes before they can walk independently, natural muscle activity is inhibited. The foot requires direct contact with the ground to correctly activate the muscle chains from the toes, through the lower leg, up to the hip. In the first year of life, shoes serve purely a protective function against cold and mechanical injury outdoors.

A lack of varied movement and exclusively flat surfaces in the home environment under-stimulate the foot muscles. Walking on parquet, laminate, or tiles repeatedly engages the same muscle groups. If stimuli such as grass, sand, stones, or uneven forest soil are missing, the foot is not stimulated to twist three-dimensionally. Intramuscular coordination deteriorates, which can lead to slackening of the tendon apparatus and subsequently to postural misalignments of the entire leg axis.

When medical evaluation is necessary

Not every gait abnormality requires immediate medical intervention, but certain findings must be examined promptly by an orthopaedic specialist or a specialised podiatry practice. Early evaluation prevents permanent damage to joint surfaces and the spine.

Seek medical advice or consult a doctor if you observe the following signs:

• The child regularly complains of pain in the feet, lower legs, or knee joints, particularly after walking short distances or at night.
• There is a distinct asymmetry where one foot deviates significantly from the shape or roll-off movement of the other foot.
• The foot cannot be passively moved into a neutral position, appears stiff, or shows clear tendon contractures.
• Recurrent skin changes occur, such as ingrown toenails, deep calluses, corns, or persistent plantar warts.
• The gait pattern suddenly deteriorates, or the child refuses to walk without any obvious external cause and insists on being carried.

Prompt action is particularly necessary for ingrown nails, known medically as unguis incarnatus. Due to constant pressure from shoes that are too short, the lateral nail border pushes into the sensitive nail fold. Painful inflammation and granulation tissue develop. Here, podiatric treatment can provide painless relief and prevent further complications.

What podiatric treatment can achieve

Modern podiatry plays a central role in preventing and treating foot problems in children. The process begins with a comprehensive, painless assessment. This involves assessing not only skin and nail structures, but also analyzing foot statics while standing and gait patterns on a podoscope or pressure plate. In our practice, we place great emphasis on a calm atmosphere to relieve any fear of instruments.

A common issue in children is inflammation of the nail fold caused by incorrect trimming of toenails or tight shoes. Podiatric treatment includes careful removal of sharp nail edges, gentle packing of the nail fold with medical non-woven material, and care of the periungual skin. If a nail is already ingrown, nail-preserving correction techniques such as orthonyxia are used. A custom-made nail brace can gently lift the nail out of the inflamed tissue and permanently correct growth without requiring surgical intervention.

For flexible toe deformities or friction-related pressure points, we manufacture custom silicone orthoses. These custom-fitting devices are made of skin-friendly medical silicone. They are moulded directly on the child's foot and serve to gently guide overlapping toes back into their natural alignment. Such orthoses are worn in shoes during the day and relieve tissue pressure immediately.

Another focus is manufacturer-independent advice on footwear and orthotic appliances. We precisely measure the length and width of the child's feet and compare these values with the insoles of the shoes brought along. Parents receive specific recommendations on what to look for when buying the next pair of shoes. The intervals between treatments depend on individual findings. For acute nail problems, short intervals of two to three weeks are common, whereas follow-up examinations to monitor development usually take place every three to six months.

What you can do yourself

As parents, you can effectively support your child's foot health through simple, consistent measures in daily life. The most important foundation is measuring feet and shoes regularly and correctly. Never rely solely on manufacturer size labels, as these are not standardized.

The following steps ensure optimal size control:

• Make a template: Have the child stand barefoot with their full body weight on a piece of sturdy cardboard and trace the outline of both feet using a vertically held pencil.
• Add growth allowance: Mark an extra 12 to 15 millimetres ahead of the longest toe. This space is essential so that the foot does not bump against the front of the shoe during roll-off and has room to grow.
• Cut out the strip and place it inside the shoe: If the cardboard strip lies flat inside the shoe without bending, the length is correct. If the edges fold up, the shoe is too small.
• If possible, remove the shoe's insole and stand your child directly on it. The distance between the longest toe and the edge of the sole must be at least a thumb's width.

Encourage walking barefoot as often as possible. Walking without shoes on natural surfaces such as grass, soil, moss, or sand is the most effective training for foot muscles. It stimulates capsular and ligament structures, strengthens the transverse arch, and trains coordination. At home during winter, non-slip socks or flexible leather slippers are completely sufficient. Rigid slippers with firm soles are counterproductive indoors.

Ensure the correct technique when trimming toenails. Nails should always be clipped or filed straight across. Corners must never be rounded deeply or cut out at the sides, as this significantly promotes ingrown nails into the lateral nail wall. A smooth nail edge that finishes flush with the tip of the toe offers the best protection.

Common mistakes

In daily practice, we regularly encounter common misconceptions that stem from the best intentions but can harm a child's foot. The best-known mistake is the thumb pressure test at the front of the shoe. When an adult presses down on the toe box, the child reflexively curls their toes. The shoe then appears to fit, although it is actually much too short. This test is medically unreliable.

Another misconception is asking the child. Young children do not have a well-developed sense of pressure pain in their toes. They often say the shoe fits because they like the design or want to leave the shop quickly. Never rely solely on your child's statement, but always verify measurements objectively.

Passing down second-hand shoes within the family or among friends carries risks. Every foot breaks in a shoe individually. The footbed and outsole of used shoes show wear patterns of the previous owner. If another child wears these shoes, their foot is forced into the pre-existing mechanical imbalance. A shoe should only be passed on if the sole shows no wear and the inner lining has no indentations.

Buying shoes with built-in footbeds or pronation supports without medical grounds is also a mistake. A healthy child's foot does not need passive support from arch supports. Artificial elevation deactivates muscular self-stabilisation. The foot becomes lazy, and the muscles atrophy. Orthopaedic insoles should only be worn based on a medical prescription for diagnosed, structural deformities.

Current research and medical context

Scientific research confirms the urgency of precise shoe fitting in childhood. A large-scale Austrian study led by Dr Wieland Kinz examined over 800 pre-school children and found that more than 85 percent of the children wore slippers that were too short, and over 60 percent wore outdoor shoes that were too short [1]. The authors demonstrated that as clearance inside the shoe decreased, the hallux valgus angle of the big toe increased significantly. Even a clearance deficit of just a few millimetres leads to measurable deviations of the big toe axis.

Biomechanical studies by Klein et al. highlighted that manufacturer shoe size labels systematically deviate from actual internal dimensions [2]. A labeled shoe size 28 frequently provided only the internal length of a size 26. The researchers strongly urged standardized measurement procedures and warned against blindly trusting size labels.

Comparative studies between shod populations and those growing up permanently barefoot, such as the study by Hollander et al., provide valuable insights into foot development [3]. Children who grow up primarily barefoot have significantly wider feet, stronger foot musculature, and a lower prevalence of flat feet than children from industrialized nations. Furthermore, they demonstrate greater jumping power and superior motor balance performance.

In summary, orthopaedic literature emphasizes the high plasticity of the child's foot skeleton. While moderate functional deviations can be monitored as part of normal development, mechanical restrictions from ill-fitting shoes inevitably lead to morphological changes [4]. Preventive measures and parent education are therefore of paramount importance.

Treatment in Memmingen

In our modern podiatry practice in Memmingen, we support parents and their children with specialized expertise. As a state-recognised podiatrist and sectoral practitioner (sektorale Heilpraktikerin for podiatry), I combine medical expertise with an empathetic approach to young patients.

Whether treating painful nails, fabricating custom silicone orthoses, or providing sound structural and footwear advice: we take time for individual assessment. Our practice in the heart of Memmingen is easily accessible for families across the entire Unterallgäu, Allgäu, and Upper Swabia regions. If you have questions or concerns regarding your child's foot health, please feel free to contact us early.