A doctor who specialises in the diagnosis and treatment of people who are mentally ill. Psychiatrists have undergone specialist training and may diagnose illness, prescribe medication and other forms of appropriate treatment.They also decide whether to admit people to and discharge from hospital.
Psychologists have skills in the assessment and treatment of mental illness and psychological problems. Unlike psychiatrists they are not medical doctors, their skills include assessing cognitive functions (for example, speech and thought) and providing talking interventions including psychotherapy and counselling.
Post-traumatic stress disorder (PTSD) is an anxiety disorder that develops following an unusually threatening event. Symptoms include flashbacks, nightmares and intense distress when exposed to an object or situation that is related to the traumatic event.