Mood swing

A mood swing is an extreme or rapid change in mood.

Associated disorders
Mood swings are commonly associated with mood disorders including bipolar disorder (manic depression) and depression. Another major factor in mood swings can be hyperactivity or hyperactivity/inattentiveness as is sometimes seen in ADHD. More commonly mood swings can be a result of dealing with daily life.

Other causes of mood swings are due to hormonal changes that can temporarily upset brain chemistry. As the hormones involved normalize, these mood swings generally subside on their own.