Unlike humans, most animals experience a fight-or-flight response when faced with a stressor but immediately return to their resting state when the danger abates. In contrast, humans spend significant amounts of time replaying what happened, assessing the choices they made, and worrying about future threats and challenges.
Rumination activates the default mode network (DMN) - the brain's self-referential processing system. This is the neural circuitry that fires when you're thinking about yourself in relation to others: your identity, your social standing, your mistakes. It's the brain asking, over and over, What does this say about me?
Studies show that people with high fluid intelligence can process multiple "what if" scenarios concurrently, helping them see ahead, identify concealed dangers, and plan their actions. This mode of thinking requires a lot of working memory because the brain isn't looping idly; it's stress-testing every single possibility that comes to mind. This might be why these people seem to be frequently lost in their thoughts, even when they're alone.
A co-worker, "Erin," has been allowed to work from home since the COVID-19 pandemic, while the rest of us came back to the office. We function alongside each other much like a small family. We have no drama, no office politics and an overall great atmosphere. Erin's absence has caused a strain on our team and has fueled resentment. Many feel it's unfair, although these feelings have not been shared with Erin.
Ever had a song stuck in your head long after the music stopped? Or found yourself replaying an argument-what you said, what you wish you had said, or how it might unfold next time? These mental loops aren't random; they're driven by a powerful feedback system in your brain. That's why catchy tunes stick and arguments replay in your head: Your brain isn't just being stubborn or "obsessed." It's looping with a purpose-like running practice drills.
Things happen at work that are upsetting. Thinking about them for the purpose of problem-solving or processing emotions makes sense. Beyond that, though, continuing to rehash negative topics, either mentally or verbally, only results in reigniting negative emotions. Although it's easier said than done, practice letting go of negative experiences and issues after you've done what you could about them.
If this sounds familiar, the reason you stay stuck in this cycle likely has to do with your mind's tendency to disguise rumination as "problem-solving." You might be under the impression that you're figuring out what went wrong or making sure you will not repeat the mistake. However, in reality, you're just reinforcing the guilt and trapping yourself even further in the same emotional cycle. Over time, this habit can end up chipping away at your confidence, relationships, and most importantly, your sense of self.
You're with a close friend, and out of nowhere, a remark your friend makes reminds you of a problem you've been dealing with that you'd rather not think about. Now you can't get it out of your mind. Although you've heard that ruminating over your worries isn't a great coping strategy, those thoughts are taking over, and you're not sure what to do. Should you share your feelings with your friend? Should you just try to distract yourself? Or both?
If you ruminate habitually, you might also ask yourself, was there a time when rumination was helpful to you or would have been? Maybe you grew up in a home where outbursts were common, and reflecting on your "mistakes" repeatedly gave you an illusion of power to avoid someone's wrath.
