If you notice foot pain when you walk, you should visit a podiatrist. According to the American Podiatrist Medical Association, at least 75 percent of Americans have experienced some type of foot pain. Common reasons for foot pain when walking include poor fitting shoes, improper posture, long periods of standing, long or ingrown toenails, bone spurs, repeat stress to previously injured areas, high impact activities, plantar fascistic, osteoarthritis, diabetes and injuries. In addition to providing treatment for many causes of foot pain, a foot doctor can fit your feet to ensure that you are wearing shoes that provide proper arch support and cushioning.