Dreams can tell us a lot of things: teeth falling out means stress, being naked at work indicates vulnerability, and spiders on your mattress means you're worried about... well, spiders. But can your dreams tell you how well you're actually sleeping at night?
Most dreams occur during the REM sleep stage, when your brain lights up and immerses you in a series of strange, unpredictable stories. Because dreaming is a completely normal part of the sleep cycle, a dream-filled night is often simply a sign that your brain is doing exactly what it's supposed to do.
