Mood is a mild, usually transient, feeling tone such as euphoria or irritability. Mood affects, facilitates both positively and negatively and it can also affect performance and that is why we have mood swings.
Mood swings are periodic alternation between feelings of well being and dejection. If occasionally these changes are normal but if they are more sever they may be a neurotic reaction and they are intense and persistent they may be symptomatic of manic-depressive disorder.
Mood combines with behavior and attitude to make a personality. Behaviour is an individuals psychological actions, reactions, and interactions to external or internal stimuli. When one moods swings the persons personality also changes that’s why it’s adviced to learn how to control our moods.