Bipolar disorder is also known as manic depression. Everyone has ups and downs but people with this condition experience dramatic fluctuations (swings) between feeling very depressed and feeling very energetic and excited (known as mania).
Young Minds – bipolar disorder: information and advice for young people about bipolar disorder
The Samaritans – telephone 08457 90 90 90: providing confidential emotional support for people experiencing feelings of distress, despair or suicidal thoughts