We are all more or less affected by small neuroses; manias, tics and controlling or manipulative behaviours. Some people have chronic and severe psychological problems. Depression, obsessive-compulsive disorder, schizophrenia, manic depression and anorexia are among them.
BIPOLAR DISORDER (MANIC DEPRESSION)
Bipolar disorder is characterized by mild to severe mood changes that can last for days, weeks or even months.