A psychiatrist is a physician who is specially trained to diagnose and treat people who are experiencing a wide range of issues, from emotional distress to more severe mental health concerns. People may make their first appointment to visit a psychiatrist when they are having difficulties at work, in relationships, or even as a result of medical conditions. These patients could be experiencing many different symptoms including sadness, lack of energy, anxiety, or mood swings. Other symptoms could include problems with sleep, memory, or appetite. In some circumstances, the symptoms may be much more severe and include hallucinations or suicidal thoughts.