"My son has severe flat feet. He falls easily when walking, running, or jumping, and I'm worried it will affect his spinal development... Should I immediately spend a fortune on custom orthopedic shoes for him?" At Compass Physiotherapy, "Flat Feet" is also a highly inquired developmental issue among parents. Seeing their child standing barefoot on the floor with the soles completely flat against the ground, and even the heels tilting inward (hindfoot valgus), many parents immediately fall into endless anxiety.
However, before rushing to pull out your wallet to buy orthopedic footwear, please take a deep breath. Physical therapists want to share a secret about human anatomy with you: almost all babies are born with flat feet! This is a perfectly normal physiological phenomenon. The key is, how do we determine if the child's arch is developing on a healthy track? And when is the right time for professional medical intervention?
Arches Are Not Innate: Understanding the Timeline of Pediatric Foot Development
The Creator's design is amazing. Newborns have a very thick layer of "fat pad" on the soles of their feet, and their joint ligaments are naturally very loose. Therefore, their feet look chubby with no sunken arch at all. This natural air-cushioned shoe is designed to protect them, allowing them to painlessly absorb the impact of tumbles and falls when they first learn to walk.
As the child begins to stand while holding on and then walk independently, the nerves on the soles of the feet are stimulated, and the muscles begin to contract and work frequently. For typically developing children, the arch develops fastest before the age of 5 to 6. Between the ages of 2 and 6, the fat pad on the sole gradually regresses, and the ankle muscles and ligaments become stronger by constantly resisting gravity. Only then will the "arch," a perfect spring for shock absorption and propulsion, slowly blossom and take shape like a flower. The development of the arch becomes mature and stable around the age of 7 to 10. Therefore, if your child is only two or three years old and you see a flat arch, please do not panic. You can observe first, as this is a necessary process of growing up. However, if there are congenital muscle tone issues or neurological problems, it is recommended to seek professional help early.
Identify in One Second: Is it "Physiological" or "Pathological" Flat Feet?
Although most cases are a transitional phase of development, we still need to distinguish whether it is a benign condition or a pathological structural issue requiring treatment. Parents can do a very simple "Non-weight-bearing test" and "Tip-toe test" at home:
- Physiological Flatfoot (Flexible Flatfoot):
When the child sits on a chair (feet non-weight-bearing, hanging in the air), or when the child tries to stand on their "tiptoes," you can clearly see the previously disappeared arch "pop out"! This means the child's bones and joints have normal mobility, but the arch collapses only because the ligaments are too loose or the muscles are too weak to support the body's weight. For this type of child, the arch can usually be trained and developed through exercise. - Pathological Flatfoot (Rigid Flatfoot):
Whether the child is sitting, lying down, or standing hard on their tiptoes, the sole of the foot is always flat. This is usually caused by congenital bone fusion abnormalities (such as tarsal coalition) or neuromuscular diseases, such as cerebral palsy or rare diseases causing abnormal muscle tone that affects foot muscle strength. It is recommended to seek medical intervention from a doctor and a physical therapist as early as possible.
When is the "Red Flag" Moment to Seek Physical Therapy?
Since most cases are flexible flat feet, should we just wait and see? At Compass Physiotherapy, we look at "whether the arch collapse has triggered a functional kinematic chain reaction" or "low muscle tone leading to poor arch development". If the child exhibits the following four major symptoms, you should no longer wait:
- Affecting Physical Fitness and Endurance (Pain): This is frequently mentioned by parents. The child asks to be carried after walking for only ten or twenty minutes or going to a hypermarket, or frequently cries about sore calves before bedtime. This indicates that the muscles are already in a state of over-fatigue to compensate.
- Frequent Falls and Clumsy Gait: The collapse of the sole will subsequently cause the calf and thigh bones to rotate inward (which is why children with flat feet often have severe pigeon-toed walking). Due to the misaligned lower limb mechanics, they sway from side to side like penguins when running and often trip over their own feet.
- Extremely Abnormal Shoe Wear: Observe the shoes your child wears often. If the "inner edge" of the insole or outsole is severely worn, or even the entire heel is tilted and deformed inward, it means the force distribution on the foot and ankle is severely imbalanced.
- Asymmetrical Collapse: If one foot has a clear arch while the other has severe flat feet. This asymmetry can lead to pelvic tilt and even scoliosis.
Common Parental Anxieties and FAQs
Q1: Will putting "orthotics" on my child earlier make the arch grow faster?
This is a myth. The muscles of the arch need to be "stimulated and used" to become strong. If a child is still developing and only relies on insoles for support, it is not enough. The muscles on the soles of the feet will realize they don't need to exert force, so they will start to "slack off and atrophy." When the insoles are removed in the future, the feet will collapse even more. The concept of physical therapy is: orthotics are used to "improve misaligned mechanics (to prevent joint wear and pain)" during daily activities, not to "create muscles out of thin air." For toddlers who are simply developing, we highly encourage them to run barefoot as much as possible on safe grass or beaches. Rich tactile feedback and uneven ground are the strongest natural supplements to stimulate the growth of the intrinsic muscles of the soles. If arch abnormalities are found, it is recommended to combine orthotics with exercise therapy for complementary treatment.
Q2: What exercises can we do at home to help our child develop their arch?
Small changes in daily life are the best prescription for strengthening the soles of the feet. For children confirmed to have low muscle tone and arch collapse after assessment, the first task is to adjust their sitting posture. If the child exhibits W-sitting, remind them or help them switch to other sitting postures. W-sitting will exacerbate internal rotation of the thighs and arch collapse; please switch to cross-legged sitting or sitting on a small stool. In terms of games, you can play a game of "picking up marbles or towels with toes" with your child, or encourage them to "walk like a little penguin on tiptoes" or "walk on their heels" at home. These seemingly simple games can strongly contract the deep small muscles of the soles, laying a solid foundation for the arch.
(Every child's growth curve is unique, and so is their arch development. If you are concerned about your child's walking posture or arch development, or if you notice your child always asking to be carried and dislikes walking, please feel free to contact Compass Physiotherapy. Let us use professional biomechanical and pediatric developmental assessments to provide the most appropriate lower limb development advice and footwear guidance for your child.)
References
- Uden H, Scharfbillig R, Causby R (2017). The typically developing paediatric foot: how flat should it be? A systematic review. Journal of Foot and Ankle Research, 10(1), 41.
- Banwell HA, Paris ME, Mackintosh S, Williams CM (2018). Paediatric flexible flat foot: how are we measuring it and are we getting it right? A systematic review. Journal of Foot and Ankle Research, 11(1), 23.
- Molina-García C, Banwell G, Álvarez-Salvago F, Reinoso-Cobo A, Pujol-Fuentes C, Medina-Luque J, Ramos-Petersen L (2024). Efficacy of Functional Re-Education as a Treatment for Infantile Flexible Flatfoot: Systematic Review. Children, 12(1), 8.