Why we’re addicted to overthinking: The trap of mental rehearsal

You are replaying a conversation you had two days ago.

You are crafting the perfect response to a message you haven’t even received.

You’re already picturing five different ways something could go wrong, even though nothing’s happened yet.

It feels like thinking, but it’s not helping. It’s just looping.

Overthinking is one of the most common things young adults deal with, especially in an age of uncertainty and constant comparison.

We convince ourselves we’re just “preparing,” but all we’re doing is exhausting our minds.

Overthinking is often disguised as being careful, but what it really does is trap us in a cycle where our thoughts feel endless and unsatisfying.

What is mental rehearsal?

Mental rehearsal is when you run through scenarios in your head before they happen.

It could be practicing a presentation, imagining a hard conversation, or planning how to act in a social situation.

It’s a natural part of how the brain prepares for uncertainty.

When done in moderation, it helps us feel more in control.

But when it turns into overthinking, it becomes emotionally draining.

The brain keeps scanning for problems to solve, even when there aren’t any.

You replay what you said in a voice note, stress over how someone looked at you, or feel tense about something small that spirals into something big in your mind.

Why the brain does this

From a psychological perspective, overthinking is often tied to anxiety.

 The brain is wired to protect us from danger.

When it senses a threat—whether physical, emotional, or social—it activates the fight-or-flight response.

But because modern “threats” look more like job interviews, online conversations, or fear of judgment, we don’t fight or flee.

We think. And think. And think.

The brain assumes that if it can mentally prepare for every possible outcome, it will stay safe. But life doesn’t work that way.

There’s no amount of preparation that guarantees certainty.

So the brain keeps looping, searching for the safety that never comes.

This pattern is called rumination in psychology.

It’s different from problem-solving.

Problem-solving leads to action.

Rumination just goes in circles.

Why it feels addictive

Overthinking becomes addictive because it gives the illusion of control.

When something feels uncertain, we want to predict or fix it in advance.

Overthinking feels like doing something, when in reality it delays the very action that would bring clarity.

There’s also a chemical side to it.

When we rehearse possible scenarios, especially negative ones, the brain releases stress hormones like cortisol.

These chemicals create a low-level state of alertness that makes us feel like we’re “on it.”

But living in that state long-term leads to fatigue, restlessness, and burnout.

Sometimes we become so used to thinking this way that stillness feels uncomfortable.

When things are quiet, our brain panics and starts scanning again.

This is how overthinking slowly becomes the default mode.

The real cost of overthinking

Living in your head all the time makes it hard to be present.

You miss out on what’s happening in front of you because you’re stuck reliving or pre-living something else.

It also chips away at confidence.

The more you doubt, the more unsure you feel, and the harder it becomes to trust your instincts.

It affects relationships too.

Overthinking can make you interpret silence as rejection, assume the worst in others, or avoid being honest out of fear.

You’re mentally running laps while the other person has already moved on.

Over time, overthinking can turn into a loop of anxiety, decision fatigue, emotional exhaustion, and avoidance.

Signs you might be mentally rehearsing too much

* You replay conversations or moments often, wondering what you should have said differently

* You feel the need to mentally prepare for social interactions or everyday situations

* You have trouble sleeping because your mind won’t slow down

* You find it difficult to make decisions, even small ones

* You feel tired after doing “nothing,” because your brain has been racing all day

How to break the cycle

1. Notice when it starts

The first step is awareness. Catch yourself in the act.

Say out loud or write down what you’re overthinking.

When you name the thought, you take away some of its power.

2. Use the 5-minute rule

If you’ve been thinking about the same thing for more than five minutes and it’s not leading to a decision or action, pause.

Ask yourself: Is this helping? If not, shift your focus, even for a few moments.

3. Do something physical

Movement can pull you out of your head.

Stretch. Take a walk. Wash your face.

The brain quiets down when the body is grounded.

4. Stop aiming for the perfect outcome

Perfectionism feeds overthinking.

Instead of trying to get things “just right,” focus on being real. Mistakes happen.

Conversations won’t always be smooth.

And most people are thinking about themselves, not analysing you.

5. Create a “mental drop zone”

Have a journal or notes app where you brain-dump your thoughts.

It doesn’t have to make sense. Just getting it out of your head helps your mind stop recycling the same loop.

6. Practice “good enough” thinking

Sometimes clarity comes after action, not before.

Train your brain to be okay with incomplete information.

It’s better to move forward with a little uncertainty than to stay stuck in mental rehearsal forever.

Thinking is important. Preparation is useful.

But when thinking turns into looping, it drains your energy and clouds your judgment.

You don’t need to rehearse every moment to be okay.

You don’t have to figure it all out before you take the next step.

Your brain was never meant to solve life in advance.

It’s okay to show up as you are, deal with things as they come, and let some questions stay unanswered for now.

Being present isn’t about knowing everything—it’s about learning to trust yourself even when you don’t.