Why You Can't Stop Overthinking (and What to Do About It)
You've replayed the conversation eleven times. You've drafted the text message, deleted it, and rewritten it in your head while lying in bed. You know, logically, that you're overthinking and somehow knowing that doesn't stop it. If you've ever wondered why your brain won't just let something go you're definitely not alone. In fact overthinking is surprisingly common. Let's talk about what's actually happening up there.
What are thought loops and intrusive thoughts?
A thought loop is exactly what it sounds like: the same thought (or close variations of it) playing on repeat, looping around and around with or without your conscious permission. An intrusive thought is a thought that shows up uninvited—sometimes strange, sometimes upsetting, sometimes oddly specific—and instead of passing through like most thoughts do, it snags on something and won't let go.
Here's the important part: almost everyone has intrusive thoughts. Research suggests they're a near-universal experience, not a sign that something is wrong with you. What varies is what your brain does after the thought shows up. For most people, an odd or unwanted thought passes through and gets forgotten. For a brain that’s prone to overthinking, that same thought gets flagged as important, and your mind starts trying to analyze, solve, or neutralize it. This habit is what ironically turns a passing thought into a loop. The problem usually isn't the thought itself (no matter how strange or uncomfortable), it’s typically more about the habit your brain builds around it.
Why your brain keeps looping
Overthinking often starts as a survival strategy. At some point, your brain learned that scanning for problems, replaying situations, or preparing for every possible outcome kept you safe. Maybe it was concern about keeping you safe from getting caught off guard, safe from disappointing someone, safe from a mistake you couldn't undo. The trouble is, a brain that's good at anticipating threats doesn't always know when to turn that skill off. So it keeps running the same scanning habit, long after the "danger" has passed. What has started off as a well-practiced neural pathway doing exactly what it was trained to do, can become too much.
The hopeful part: your brain can actually change
Here's the good news based in neuroscience: your brain is neuroplastic, meaning it's constantly capable of forming new neural pathways and weakening old ones, based on what you practice. Overthinking feels so automatic because it is a well-worn path—your brain has run that same loop so many times it's become the path of least resistance, like a groove worn into a hiking trail from years of the same footsteps.
But grooves aren't permanent. Every time you notice a loop and respond to it differently (even in a small way) you're literally forging an alternate path. It won't happen in one try, the same way one new hiking trail doesn't erase years of a well-worn one. But with repetition, new pathways get stronger and old ones get quieter from disuse.
A few things that can help build new pathways
Name the loop. Simply noticing "I'm doing the thing again" or “ooh this is a thought loop” starts to interrupt the automatic pattern.
Set a worry window. Give yourself 10 minutes to think it through on purpose, then practice redirecting when the time is up. Literally set a timer and then move on when it’s up.
Get it out of your head. Writing thoughts down gives your brain a new way to process instead of just replaying. You can also try singing, drawing or dancing the thoughts out.
Interrupt with your body. A short walk, a change in room, or a few grounding breaths gives your brain a different pattern to practice.
Let the thought pass without solving it. Not every intrusive thought needs an answer and practicing "noticing without engaging" is its own new pathway. Think about it like watching clouds pass by, each thought can be noticed but just keeps moving through.
When it's more than everyday overthinking
Sometimes overthinking is just overthinking. But sometimes it's connected to something more specific: anxiety that keeps the "what ifs" running, OCD that creates stickier, harder-to-shake loops, or a neurodivergent brain (like ADHD or autism) that processes and holds onto thoughts differently. None of that means something is wrong with you, nor something unchangeable. It does mean that your particular brain might benefit from support that's built for how it actually works. Learning more about how your own brain specifically functions can help you build tools and strategies for reducing overthinking.
You don't have to figure this out alone
If overthinking has been a long-term experience rather than an occasional occurrence, working with a therapist can help you understand your own mind more clearly— what's driving the loops, and what kind of support would actually help you build new pathways. If you’re curious about working with me to reduce overthinking, reach out here if you'd like support making sense of what's going on in your mind.