The primary symptom of flatfeet is the absence of an arch upon standing. Additional signs of flatfeet include the following:

  • Foot pain
  • Pain or weakness in the lower legs
  • Pain or swelling on the inside of the ankle
  • Uneven shoe wear

While most cases of flatfeet do not cause problems, complications can sometimes occur. Complications include the following:

  • Bunions and calluses
  • Inability to walk or run normally
  • Inflammation and pain in the bottom of the foot (plantar fasciitis)
  • Tendonitis in the Achilles heel and other ligaments
  • Pain in the ankles, knees, and hips due to improper alignment
  • Shin splints
  • Stress fractures in the lower legs

Publication Review By: Hai-En Peng, D.P.M.

Published: 16 May 2007

Last Modified: 15 Sep 2015