Overthinking and intrusive thoughts: the loop between body and mind

Overthinking and intrusive thoughts feel like problems of the mind. In the Return Inwards Model they start in the body. A dysregulated nervous system keeps the survival brain on alert, and an alert survival brain thinks: it scans, replays and rehearses. Intrusive thoughts are a direct result of repressed anger and that same dysregulated nervous system. The two feed each other in a loop.

You can't think your way out of a loop that runs in the body. But you can come back into the body, and when the body settles, the mind follows.

The survival brain

Part of you is built for one job: keeping you alive. We call it the survival brain. When it senses danger, it takes over. Your heart speeds up, your breath gets short, your muscles brace, and your thinking narrows to one question: what's the threat, and how do I get ahead of it?

That is useful when the danger is real. The trouble starts when the nervous system was set in a home where danger was frequent or unpredictable. The Safety need learned to stay on guard. The Safety × Pursue Template runs on the rule if I watch everything, I'll be safe. Years later, the alarm is still set, and the survival brain keeps watching in a life that no longer needs it to.

Overthinking is the alarm talking

Overthinking is what an alert survival brain does with a quiet moment. It replays the meeting. It rereads the message. It rehearses the argument that hasn't happened. It plans for every outcome at 2 a.m.

It feels like problem-solving, and it's exhausting, because there is no problem to solve. The thoughts aren't really about the meeting. They are the body's alarm, translated into words.

That's why reasoning with the thoughts rarely helps. You answer one worry and another appears. The alarm wasn't asking a question. It was signaling that the body doesn't feel safe.

Where intrusive thoughts come from

Intrusive thoughts are different. They arrive uninvited: a sudden image of something going terribly wrong, a cruel thought about someone you love, an urge you would never act on. People are often frightened and ashamed of them.

In our model, intrusive thoughts are a direct result of repressed anger and a dysregulated nervous system. Many people learned early that anger wasn't allowed. Showing it brought punishment, or silence, or a parent's fear. So the anger was pushed down: the Expression × Withdraw rule, if I hide what I feel, I won't be hurt.

Anger that is pushed down doesn't disappear. It is energy in the body with nowhere to go. When it can't be felt directly, it comes back sideways, as thoughts and images that seem to come from nowhere and feel nothing like you.

Having an intrusive thought says nothing about who you are or what you want. It says something was held down for a long time.

The loop

Put together, the loop looks like this:

1. Something echoes an old danger.
2. The nervous system goes on alert.
3. The survival brain switches on and starts overthinking.
4. The anger that comes with feeling threatened is pushed down.
5. It returns as intrusive thoughts.
6. The thoughts feel like danger, so the body stays on alert, and the loop runs again.

A Thursday night

Nadia's manager says, "Can we talk tomorrow?" and leaves. By 11 p.m. Nadia has imagined five versions of the conversation. Then, brushing her teeth, a vivid image arrives of shouting at her manager and throwing her laptop. She's horrified. She would never.

Later she notices what she hadn't let herself feel: she was angry. Her manager had been short with her all week. Growing up, anger in her house belonged to her father, and nobody else was allowed it.

She sits on the edge of the bed, feels the heat in her chest and lets herself say, quietly, "I'm angry." Her breath slows. The rehearsing stops sooner than usual.

The way out

The way out isn't more thinking. It's coming back into the body:

• Notice the alarm. Name what your body is doing: racing heart, tight jaw, held breath.
• Find the anger. Ask, "Is there something I'm angry about that I haven't let myself feel?"
• Let it be felt safely. Anger can be felt without being acted out. Breathe into it. Press your feet into the floor. Let it move through.
• Let the body settle first. As the alarm comes down, the thoughts lose their fuel.

For more on feelings in the body, see our page on somatic awareness.

Return inwards.