The human foot is a complex structure. It contains 26 bones, as well as muscles, nerves, ligaments, and blood vessels, and is designed for balance and mobility. The 52 bones in your feet make up about a quarter of all the bones in your body. Podiatrists, also known as chiropodists, diagnose and treat disorders, diseases, and injuries of the foot and lower leg to keep this area of the body working properly.

Podiatrists treat corns, calluses, ingrown toenails, bunions, heel spurs, and arch problems; ankle and foot injuries, deformities and infections; and foot complaints associated with diseases such as diabetes. To treat these problems, podiatrists prescribe drugs, order physical therapy, set fractures, and perform surgery. They also fit corrective inserts called orthotics, design plaster casts and strappings to correct deformities, and design custom-made shoes. Podiatrists may use a force plate to help design the orthotics. Patients walk across a plate connected to a computer that "reads" the patients' feet. From the computer readout, podiatrists order the correct design.

To diagnose a foot problem, podiatrists order X-rays and laboratory tests. The foot may be the first area to show signs of serious conditions such as arthritis, diabetes, and heart disease. For example, diabetics are prone to foot ulcers and infections due to poor circulation. Podiatrists consult with and refer patients to other health practitioners when they detect symptoms of these disorders.

Most podiatrists have a general practice. Some specialize in surgery, orthopaedics, primary care, or public health. Besides these board-certified specialities, podiatrists may practise a sub-speciality such as sports medicine, pediatrics, dermatology, radiology, geriatrics, or diabetic foot care.