A podiatrist, or doctor of podiatric medicine, is a healthcare specialist who provides medical diagnosis and treatment of foot and ankle problems, including sprains and fractures, bunions, heel pain/spurs, hammertoes, neuromas, ingrown toenails, warts, corns and calluses. A podiatrist also renders care of sprains, fractures, infections, and injuries of the foot, ankle and heel. A podiatrist is required to complete four years of undergraduate medical school training and four years of podiatric medical school in order to obtain the appropriate credentials to practice podiatric medicine. Additionally, they frequently complete post graduate residency training in podiatric primary care, orthopedics and/or surgery. As with all physicians, podiatrists are required to take state and national exams, as well as be licensed by the state in which they practice. According to the American Podiatric Medical Association, there are more than 17,800 practicing podiatrists in the United States. As the population of the U.S. continues to age, the demand for podiatric care will increase.