Psychiatrists are doctors who diagnose and treat mental illnesses through a long education and training process. They commonly treat conditions like depression, anxiety, eating disorders, and addictions. Psychiatrists work long hours in hospitals, clinics, and research centers and deal with stressful and emotionally draining work. While the job outlook is growing, it requires a bachelor's degree, four years of medical school, and four years of residency training minimum before being licensed to practice psychiatry.