A "doktor" is a term used in various languages, including German and Polish, to refer to a medical professional who is qualified to diagnose and treat illnesses. Doctors typically complete extensive education and training, including a medical degree and residency, to gain the necessary skills to care for patients. In addition to treating physical ailments, doctors often provide preventive care and health education. They may specialize in different fields, such as pediatrics, surgery, or psychiatry, allowing them to focus on specific areas of medicine and patient care.