What is the definition or description of: mood changes?

Need more indo: Perhaps you are asking about severe and sudden changes in mood that do not correspond to the current situation? If so, this might indicate a mood or personality disorder.

Mood swings: If your mood is one way in one moment or hour adn then changes to something totally different in another moment, such as going from happy to angry or sad in a short period of time. It can be a symptom of a mood disorder like depression or bipolar illness.