Mental Disorders Mental disorders/illnesses are a range of mental health conditions that affect your mood, thinking, and behaviour. A mental health concern becomes a mental disorder when ongoing signs and symptoms cause frequent stress and affect your ability to function. The following are descriptions of some common mental illnesses/disorders. Multiple Personality Disorder/Dissociative Identity Disorder (DID) This is a severe condition in which two or more distinct identities or personalities are present in- and alternatively take control of- an individual. The individual also experiences extensive memory loss. Usually a primary personality carries the individual’s given name and is passive, dependent and depressed. When in control each personality may have its own…