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Causes

By Mayo Clinic staff

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Illustration comparing normal and flatfeet footprints 
Flatfeet

A flat foot is normal in infants and toddlers, because the foot's arch hasn't yet developed. Most people's arches develop throughout childhood, but some people never develop arches. This is a normal variation in foot type, and people without arches may or may not have problems.

Arches can also fall over time. Years of wear and tear can weaken the tendon that runs along the inside of your ankle and helps support your arch.

References
  1. Adult (acquired) flatfoot. American Academy of Orthopaedic Surgeons. http://orthoinfo.aaos.org/topic.cfm?topic=A00173. Accessed May 31, 2012.
  2. Flexible flatfoot in children. American Academy of Orthopaedic Surgeons. http://orthoinfo.aaos.org/topic.cfm?topic=A00046. Accessed May 31, 2012.
  3. Canale ST, et al. Campbell's Operative Orthopaedics. 11th ed. Philadelphia, Pa.: Mosby Elsevier; 2008. http://www.mdconsult.com/das/book/body/208746819-4/0/1584/0.html. Accessed May 31, 2012.
  4. Kliegman RM, et al. Nelson Textbook of Pediatrics. 19th ed. Philadelphia, Pa.: Saunders Elsevier; 2011. http://www.mdconsult.com/das/book/body/208746819-6/0/1608/0.html. Accessed May 31, 2012.
  5. Posterior tibial tendon dysfunction. American Academy of Orthopaedic Surgeons. http://orthoinfo.aaos.org/topic.cfm?topic=A00166. Accessed May 31, 2012.
  6. Laskowski ER (expert opinion). Mayo Clinic, Rochester, Minn. May 31, 2012.
DS00449 Aug. 18, 2012

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