In most cases, the presence of flat feet doesn’t directly cause any complications. While you may experience pain from time to time, there are some easy ways to remedy this pain. However, flat feet can worsen problems and injuries that you experience in your lower legs, feet, or ankles. If you suffer from arthritis in your feet or ankles, the pain from this condition will likely become worse because of your flat feet. The same is true for such conditions as shin splints, bunions, and Achilles tendonitis.