If you have flatfeet, the arch on the inside of your feet is flattened. It's a common and generally painless condition. Sometimes, flatfeet occur because your arches don't develop during childhood. In other cases, flatfeet may occur as you age or after you've had a pregnancy.
While flatfeet usually won't cause any problems, if the condition causes your ankles to turn inward, you may have problems in your feet, ankles and knees. Simple corrective devices are available that can help you prevent some of the complications of flatfeet.