Emotional instability (or affective dysregulation) often refers to the psychological condition that makes people experience rapidly changing moods.
Strong emotions are felt by the people who suffer this condition. They might start uncontrollably laughing or burst out into tears.
According to Ashley B. Hampton, Ph.D., it is centered around unpredictability in emotions and reactions to events. While most people experience a wide range of emotions, most people can manage them.Read more on powerofpositivity.com