I was much too far out all my life
And not waving but drowning.
– Stevie Smith
Mood disorders are characterised by wide emotional swings ranging from deeply depressed to highly euphoric and agitated. Depression is linked to an increased rate of suicide.
Major depression is a mood disorder in which the individual is deeply unhappy, demoralised, self-derogatory and bored. Symptoms are characterised by changes in appetite and sleep patterns, decreased energy, feelings of worthlessness, problems concentrating and guilt feelings that might prompt thoughts of suicide.
Bipolar disorder is a mood disorder characterised by extreme mood swings; an individual with this disorder might be depressed, manic or both. In contrast with someone who is depressed, a manic experiences elation, exuberance and tireless stamina. They may also be restless, scheming, humorous and irritable, be in constant motion and have a tendency to excess.