A physician is a medical professional who is trained to diagnose and treat illnesses and injuries. They often hold a Doctor of Medicine (MD) or Doctor of Osteopathic Medicine (DO) degree and have completed extensive education and clinical training. Physicians can specialize in various fields, such as pediatrics, cardiology, or orthopedics, allowing them to focus on specific health issues. Physicians typically work in hospitals, clinics, or private practices. They conduct physical examinations, order diagnostic tests, and prescribe medications. Their primary goal is to promote health and well-being, guiding patients through preventive care and treatment options for various medical conditions.