FotoHelin / Shutterstock Introverts and extroverts have different brain chemistry ways of functioning. Introverts often need to take time out in an "introvert hangover." This is where they spend time alone and recharge after a lot of social stimulation. But this isn't a negative experience. In fact, introverts spend this time being creative and learning about themselves. If you identify as more of an introvert than an extrovert, you'll know that means you are more energised by spending time on your own, or in very small intimate groups of people you trust.