<P> A mood swing is an extreme or rapid change in mood . Such mood swings can play a positive part in promoting problem solving and in producing flexible forward planning . However, when mood swings are so strong that they are disruptive, they may be the main part of a bipolar disorder . </P> <P> Mood swings can happen any time at any place, varying from the microscopic to the wild oscillations of manic depression, so that a continuum can be traced from normal struggles around self - esteem, through cyclothymia, up to a depressive disease . However most people's mood swings remain in the mild to moderate range of emotional ups and downs . </P>

What is it called when you have sudden mood changes