Individuals who diagnose illnesses and prescribe and administer treatment for people suffering from injury or disease. Physicians examine patients; obtain medical histories; order, perform and interpret diagnostic tests; and counsel patients on diet, hygiene and preventive health care. Surgeons are physicians who specialize in the treatment of injury, disease and deformity through operations. Using a variety of instruments, and with patients under general or local anesthesia, a surgeon corrects physical deformities, repairs bone and tissue after injuries or performs preventive surgeries on patients with debilitating diseases or disorders. Physicians work in one or more specialties including anesthesiology, family and community medicine, general internal medicine, general pediatrics, obstetrics and gynecology, allergy, cardiology, dermatology, gastroenterology, radiology and surgery.