What causes mood swings?
There are many reasons why a person can experience mood swings. They often involve many biological systems and, as such, the research around them is complex and ongoing.
"Mood swings are significant changes in mood," said Dr. Elizabeth Wassenaar, regional medical director of the Pathlight Mood & Anxiety Center in Colorado. "While we mostly think of shifting from happy to sad, mood swings can also include shifting from being calm to anxious or from feeling unbothered to irritable."
Mood changes are a natural part of the human experience. Yet if symptoms are extreme or interfere with a person's daily life, it may indicate an underlying cause.