What is the medical name for flatfoot?
Pes planus. When the heel also tilts outward — the usual pattern — it is called pes planovalgus.
Flatfoot: Frequently Asked Questions
Direct, physician-reviewed answers to the questions parents and patients ask most about flat feet — from arch development in toddlers to recovery after reconstructive surgery.
Medically reviewed byDr. Mutasem Aldhoon— Pediatric Orthopedic Consultant· Last reviewed: August 2026
General
Is flatfoot hereditary?
Foot shape and ligament laxity run in families, and tarsal coalition shows clear autosomal dominant inheritance. A family history of flat feet is common and, on its own, not a reason for treatment.
Can flat feet cause knee, hip, or back pain?
Severe hindfoot valgus changes lower-limb alignment and can contribute to anterior knee pain in some patients. In most people with mild, flexible flat feet, unrelated causes of knee and back pain are far more likely.
How long is recovery after flatfoot reconstruction?
After calcaneal lengthening with soft-tissue balancing, children are typically non-weight-bearing for about six weeks, walk in a boot for a further four to six weeks, and return to sport at around six months.
Is flatfoot surgery safe in a growing child?
Modern reconstruction is deliberately joint-sparing and growth-aware: osteotomies avoid physes and fusions are avoided wherever possible, so the foot keeps growing and keeps its subtalar motion.
Does flatfoot disqualify someone from military or sports service?
Asymptomatic flexible flatfoot does not impair performance and most services accept it. Symptomatic, rigid, or surgically untreated painful deformity is assessed case by case.
Flatfoot
Is flatfoot a disability?
No. Flexible flatfoot is a normal anatomical variant present in roughly one in five adults, and it does not limit walking, running, or sport. Only painful, stiff, or progressive deformity limits function, and that form is treatable.
Do insoles cure flat feet?
No. Randomised evidence shows orthoses do not build an arch or change the natural history of flexible flatfoot. They can reduce pain and shoe-wear problems in symptomatic feet, which is a valid but different goal.
At what age should the arch appear?
The medial arch typically develops between ages 3 and 10. A flat foot in a toddler is expected. Persistent flatness after age 10, especially with pain or stiffness, warrants assessment.
When does flatfoot need surgery?
Surgery is indicated for pain that persists despite a genuine trial of stretching, footwear and activity modification, for rigid deformity such as a symptomatic tarsal coalition, and for progressive neuromuscular planovalgus. The aim is a balanced, plantigrade foot using joint-sparing osteotomies rather than fusion.
Flexible flatfoot
Will my child grow out of flexible flatfoot?
The arch height improves in most children up to about age 10, but roughly 15–20% of adults keep a flexible flat foot for life with no consequences. Function, not arch height, is what matters.
Should my child wear special shoes?
No. Corrective or 'orthopedic' shoes have never been shown to alter arch development. A comfortable, well-fitting shoe with a firm heel counter is enough.
Rigid flatfoot
How do I know if my child's flat foot is rigid?
Ask the child to stand on tiptoes. If the heel does not swing inward and no arch appears, and the foot is painful or stiff, treat it as rigid until proven otherwise and seek assessment.
Is rigid flatfoot always painful?
Not always. Some coalitions are found incidentally and stay silent. Pain typically begins in adolescence as the bar ossifies and stresses the surrounding joints.
Tarsal coalition
Can a tarsal coalition come back after surgery?
Regrowth is uncommon when the resection is complete and the gap is filled with interposition tissue. Persistent pain after surgery more often reflects uncorrected hindfoot valgus or established arthritis than true recurrence.
Is tarsal coalition inherited?
Often yes. It arises from failed segmentation in the embryo and shows autosomal dominant inheritance with variable penetrance, so it is worth examining siblings who complain of foot pain.
Adult flatfoot
How is adult flatfoot different from childhood flatfoot?
Childhood flexible flatfoot is a developmental shape that is usually stable and painless. Adult acquired flatfoot is a new, progressive deformity in a foot that used to have an arch, and it is a tendon disease first and a bone deformity second.
Can I still exercise?
Yes, with modification. Swimming, cycling and controlled strengthening are encouraged; prolonged standing, running on hard surfaces and unsupported footwear aggravate the tendon.
Symptoms & diagnosis
Do I need an X-ray for flat feet?
Not if the foot is flexible and painless. X-rays are indicated for pain, stiffness, asymmetry, or a deformity that is getting worse, and they must be taken standing.
Which specialist treats flatfoot?
A pediatric orthopedic surgeon for children and adolescents, and a foot and ankle orthopedic surgeon for adults. Complex, rigid, neuromuscular, or revision cases should go to a subspecialist who reconstructs these feet regularly.
Treatment
What exercises help flat feet?
Calf stretching with the knee straight is the priority. Heel raises, short-foot exercises and single-leg balance work strengthen the supporting muscles and reduce pain, though they do not permanently change arch height.
Are custom orthotics worth the cost?
For most symptomatic flexible flat feet, a good prefabricated device performs as well. Custom devices are justified for marked deformity, neuromuscular feet, or when an off-the-shelf device cannot be fitted comfortably.
Flatfoot in children
My 4-year-old has flat feet — should I worry?
No. At four, an absent standing arch is expected. If the arch appears when they stand on tiptoes and they have no pain, no treatment is required.
Do children need arch-support shoes?
No. Studies of corrective footwear in children show no effect on arch development. Flexible, well-fitting shoes and barefoot play are better for developing foot strength.
Dr. Mutasem Aldhoon
Dr. Mutasem Aldhoon is a leading Pediatric Orthopedic Consultant specializing in complex lower extremity deformities. With extensive experience in advanced joint-sparing and reconstructive techniques, he is the trusted authority for severe pediatric flatfoot and neurological foot reconstructions.