Bipolar disorder, known in the past as manic depression, is a condition that affects people's moods, which can swing from one extreme to another.
People with bipolar disorder have periods of:
- Depression - where they feel very low and lethargic
- Mania - where they feel very high and overactive
- Les severe mania is known as hypomania
The exact causes of bipolar disorder are unknown and it is relatively common - around one person in 100 is diagnosed with the condition.
More top news
A six-year-old boy was shot in the stomach by his brother, aged five, in the third child shooting in just four days in Texas.
Social media users have been sharing their amended versions of the incredible pictures.
Showers will make their way from west to east this afternoon, moving quickly and not lasting too long.