I have been having a lot of pain near the top, inside of my right foot. The arch is OK and the toes are fine, but the interior, top portion of the foot hurts quite a bit to walk. Any suggestions for what this might be or how to alleviate the pain? It began to hurt after returning from a 30 minute brisk walk, so I'm not sure if that aggravated a problem or not. Any help would be appreciated.