Adult acquired flatfoot is a common culprit of foot, ankle and knee pain.
Flat feet are the result of a collapsed arch that causes the entire foot to lay flat when standing. This can cause foot pain, difficulty stretching and standing, swelling of the feet and ankles, and dry, flaky skin.
Flat feet can also cause pain in other areas of the body. For instance, it can influence knee posture and cause the joints to twist inwards, aggravating muscles, ligaments and tendons in and around the joint.
Treatment options for flat feet include orthotics, braces, physical therapy, and surgery if the nonsurgical treatments are unhelpful.