Parents frequently notice that young children have flat feet and wonder whether arch supports or special shoes are needed. The honest answer is that flat feet are the normal developmental starting point. All babies are born with flat feet — the arch is a structure that develops through walking, weight-bearing, and the gradual maturation of the intrinsic foot muscles and ligaments.
Shoe companies have done a particularly effective job of creating parental anxiety about this, and there is a well-established market in arch supports, corrective shoes, and orthotics for children. The scientific evidence for these products in typical developmental flat feet is slim. The arch develops as it develops, at its own pace, through normal activity.
Healthbooq (healthbooq.com) covers musculoskeletal development through childhood.
Normal Arch Development
Babies and toddlers have a fat pad on the sole of the foot that fills in the arch space and makes the foot appear flat even when the underlying structure is developing normally. The longitudinal arch becomes apparent as the fat pad is absorbed and the intrinsic muscles and supporting ligaments mature.
By age two, most children have some arch visible when sitting. By age six, the arch is typically well-established. In some children, full arch development occurs later, and some adults retain flexible flat feet throughout life without any functional problems.
The term "flexible flatfoot" describes the situation where the arch disappears with weight-bearing but is visible when the child sits with feet dangling, stands on tiptoe, or extends the big toe upward. This is normal and does not require treatment.
When Flat Feet Are Significant
The distinction that matters clinically is between flexible and rigid flat feet.
Rigid flat feet do not develop an arch in any position — sitting, standing on tiptoe, extending the big toe — and are always worth investigating. Rigid flatfoot can be caused by tarsal coalition (abnormal bony fusion of two tarsal bones), congenital vertical talus (a serious condition identified in infancy), or neuromuscular conditions affecting foot posture. These require orthopaedic assessment.
Pain is the other key indicator. Flexible flat feet that cause pain in the arch, heel, ankle, or knee, limit the child's ability to keep up with peers, or cause significant fatigue after normal activity are worth assessing. It is worth noting that most children with flexible flat feet have no pain at all — the presence of flat feet and the presence of foot pain are not reliably connected.
Other features that warrant referral: a foot that appears to have suddenly developed a flat appearance (could indicate a new condition or injury), flat feet associated with generalised joint laxity and hypermobility, and flat feet in children with Down's syndrome or cerebral palsy (where structural footwear and orthotics may help with function).
Footwear
The best footwear for children with developing arches is supportive, well-fitting shoes for activities where protection is needed — and no shoes at all when safe to go barefoot. Walking on natural surfaces barefoot provides variable sensory and proprioceptive input that supports normal foot development.
Highly cushioned or overly structured footwear in very young children may reduce the proprioceptive feedback important for balance and gait development. Flip-flops and completely flat, rigid-soled shoes are not ideal for regular wear.
There is no good evidence that arch supports, custom orthotics, or corrective shoes alter the natural history of flexible flat feet in otherwise healthy children. A Cochrane review of orthotic interventions for flat feet found insufficient evidence to support routine use in asymptomatic children.
For children with symptomatic flat feet (pain, functional limitation), physiotherapy targeting calf flexibility, intrinsic foot muscle strengthening, and proprioceptive training has some evidence of benefit. If conservative measures are insufficient, orthotics may be trialled for symptom management, though they do not structurally correct the arch.
When to See a GP or Podiatrist
Most children with flat feet need no appointments at all. See a GP or paediatric podiatrist if: the child complains of regular foot, ankle, or knee pain, is reluctant to walk distances, the feet appear rigid (no arch even on tiptoe), or the gait appears significantly abnormal. A GP can examine the feet and refer to orthopaedics or podiatry as appropriate.
Key Takeaways
Flat feet are normal in babies and toddlers. The arch develops gradually and is not fully established until around age six to eight. Most flat feet in children are flexible — the arch appears when the child stands on tiptoe or sits with feet off the floor — and require no treatment. Rigid flat feet, flat feet causing pain or limiting activity, or flat feet associated with other conditions may need further assessment. Arch supports and special shoes have not been shown to speed up arch development in children with flexible flat feet.
