Flat feet (low or absent arches) are reported more often in autistic children than in non‑autistic peers, but flat feet are not a sign or diagnostic feature of autism. They are a common, mostly orthopedic issue that can affect anyone, with or without autism.
## Is there a link?
- Gait and foot‑pressure studies show many autistic children walk with a more flat‑footed pattern, with reduced heel‑toe roll‑off and different pressure distribution under the feet. This is often described as a “flat‑footed” or broader‑based gait.
- The likely reasons include differences in motor coordination, balance, muscle tone, and sensory processing (for example, reduced awareness of foot position or discomfort).
## Important clarifications
- Flat feet are not used in diagnosing autism and, on their own, do not suggest a child is autistic. Autism diagnosis is based on social communication differences and restricted-repetitive behaviors, not foot shape.
- Not all autistic people have flat feet, and many non‑autistic children have flexible flat feet that improve with age.
## When to be concerned
- Flat feet may need attention if there is pain, frequent tripping, very tired legs, obvious gait problems, or difficulty keeping up with peers in physical activities.
- In autistic children, untreated foot problems can worsen balance, limit participation in sport-PE, and increase fatigue or behavioral distress linked to discomfort.
