It's three in the morning and you're still awake, replaying a conversation from yesterday, a decision you can't quite make or that comment that got under your skin. The thought goes round and round, always along the same track, and the more you think, the worse you feel. If that sounds familiar, you know overthinking well: that looping way of thinking that leads nowhere yet is so hard to climb out of.
In my practice it's one of the lines I hear most: "I can't stop thinking." Let me explain what overthinking —what psychologists call rumination— actually is, why the brain gets hooked, how it differs from real reflection, why it gets worse at night and, above all, what you can do to break the cycle. According to the American Psychological Association, rumination is thinking repetitively and passively about your own feelings and problems without moving into action.
What is rumination (overthinking)
Overthinking —or rumination— is going over a thought, almost always a negative one, again and again without reaching any conclusion or solution. It isn't analysing a problem in order to solve it: it's replaying it over and over, like a scratched record. It usually circles around the past ("why did I say that?") or the distress we feel right now ("why do I feel so bad?").
The word comes from the Latin ruminare, to chew the cud, like cows do with their food. The image fits: chewing the same thing over and over without ever swallowing it.
Overthinking isn't the same as reflecting
This distinction changes a lot. Reflecting has a direction: you think about something to understand it, learn from it or decide, and once you get somewhere, you stop. Overthinking goes nowhere: it spins on itself, produces no new answers and, in the end, leaves you worse than you were. There's a simple test to tell them apart: if after thinking you feel a little clearer, you were reflecting; if you feel more sunk and just as stuck, you were ruminating. And be careful, because the brain is very good at dressing up rumination as reflection: it convinces you that you're "analysing" something when really you're just suffering it in circles.
Why the brain gets hooked
Nobody overthinks on purpose. The brain does it because, deep down, it feels like it's doing something useful: "if I go over it enough, I'll solve it, or at least I'll be ready for the worst." It's a false sense of control. It shows up more when there are undigested emotions, when we're perfectionists or very hard on ourselves, or when we're low or dealing with anxiety. And it has a trap built in: the lower your mood, the easier it is to fall into it; and the more you ruminate, the lower your mood. A circle that feeds itself.
The myth of thinking it through
There's a widespread belief that's hard to shake: that if I turn a problem over enough, I'll eventually find the solution or, at the very least, be ready when it arrives. It sounds reasonable, but overthinking doesn't work that way. After a first moment when thinking really does help you understand, every extra loop adds nothing new: it just waters the worry and makes it grow. It's the difference between watering a plant and drowning it. In fact, the best ideas rarely turn up while we're chewing things over, but when we stop: in the shower, out on a walk or just before falling asleep, when the mind loosens its grip. Thinking more doesn't give you more control over what will happen; it only makes you spend more time suffering it in advance. In session, when someone realises they've spent months mentally "solving" things that were never in their hands, the relief is immediate: they didn't need to find the perfect answer, they needed to stop looking for it on a loop.
Overthinking, anxiety and mood
Overthinking is central to both anxiety and depression. In anxiety it takes the shape of anticipatory worry —the classic "what if...?"— and always looks forward. In depression it looks backward, toward guilt and everything that went wrong. In both cases it does the same thing: it keeps the distress alive and makes it last. Both MedlinePlus on anxiety and the National Institute of Mental Health on depression point in the same direction: repetitive thinking is one of the engines that needs switching off.
Night-time overthinking: why it hits at 3 a.m.
During the day, work, people and screens keep us busy. At night there's none of that: you lie down, the light goes off and your mind fills the silence with everything it couldn't process during the day. That's why overthinking flares up right when you want to sleep, and it's one of the most common causes of onset insomnia. If it happens to you often, the article on sleep disorders and insomnia will help you understand it better. And remember one thing: tired and in the dark, everything looks bleaker than it really is.
How to tell you're overthinking (and not just thinking)
It isn't always easy to notice from the inside. These signs help you tell overthinking apart from useful thinking:
- The same thought comes back again and again, with almost no variation.
- You reach no new conclusion or decision, however hard you push.
- After thinking about it you feel worse, not better.
- You notice tension in your body and can't concentrate on anything else.
- You swap action for going in circles: you think a lot about the problem instead of doing something about it.
How to stop overthinking
It isn't about "not thinking" —that never works— but about taking the power away from the loop. These strategies help:
- Name it: "here I go again." Noticing is the first step to choosing your way out instead of being dragged along.
- Ask whether it has a solution now: if it does, take one concrete step, however small; if it doesn't right now, postponing it isn't giving up, it's refusing to suffer for nothing.
- Set a "worry time": fifteen minutes a day to go over things freely. When the thought shows up outside that slot, park it until then.
- Come back to your body and the present: mindfulness helps you get out of your head and anchor into what's happening now.
- Put distance between you and the thought: "I'm a disaster" isn't the same as "I'm having the thought that I'm a disaster." Much of emotional regulation runs through here.
- Move: walking, moving your body or changing your surroundings breaks the loop far better than trying not to think.
- Write it down: getting the thought out of your head and onto paper often drains its force.
When to seek professional help
If overthinking keeps you awake, holds you in constant anxiety or sadness, or you notice you can't stop it however hard you try, it's worth asking for help. In therapy we work on both the content —what worries you— and the pattern —why you get hooked—, with concrete tools to loosen it. I do this with online therapy for anxiety and online therapy in Spanish or Catalan, wherever you live.
If you recognize yourself in this, get in touch for a first assessment with no commitment. One last thought, and this one's worth keeping: thinking a lot isn't the same as thinking well. Sometimes the way to understand things isn't to give them more thought, but less.