noun [C or U] Definition - An illness that affects the mind
Mental illness takes many forms from depression and anxiety to neurosis, psychosis, paranoia, bi polar disorder, schizophrenia and personality disorder. Alarmingly 1 in 4 people will experience some kind of mental health problem in the course of a single year.
Only 1 in 10 prisoners has no mental disorder. Women are more likely to be treated for mental health problems although British men are three times as likely to die by suicide than British women. And about 10% of children have a mental health problem at any one time. It stands to reason, someone you know will be a sufferer.