How to Stop ‘What If’ Thinking: Break the Spiral

To stop “what if” thinking, name the one question actually running the spiral, rate how urgent it feels, then run a few rounds of bilateral stimulation, the left-right technique behind EMDR, while it sits loosely in mind. This won’t answer the question, but it can quiet the loop enough to think clearly again.

It starts with one reasonable question. What if the lump is something. What if they’re upset with me. What if I say yes and end up regretting it.

Ten minutes later you’re five or six “what ifs” deep, no closer to an answer, and your chest is tight like something has actually gone wrong.

Nothing has happened yet. That’s the strange part. Your mind is just climbing a tree that doesn’t exist, one branch at a time, and it won’t stop climbing on its own.

Why does your mind keep asking “what if”?

Researchers have studied this exact chain. In something called a catastrophizing interview, people are asked “what if X happens,” then asked what if about their own answer, again and again, until they choose to stop. A 2012 study in Behaviour Research and Therapy found that people who tolerate uncertainty poorly kept the chain going far longer, and ended up more anxious and sad by the end of it, than people who tolerate uncertainty well.

Underneath the chain is usually the same thing: how much not-knowing you can tolerate. A 2023 meta-analysis in the Journal of Anxiety Disorders followed nearly 1,200 people with generalized anxiety disorder and found that as treatment lowered their intolerance of uncertainty, anxiety symptoms dropped right along with it. “What if” thinking is rarely about the actual outcome. It’s about needing to know it before your mind will agree to stop.

Each “what if” usually comes with a picture attached, not just words: a scene your mind plays like it’s already happening. Researchers call these “flashforwards.” A 2010 study in Behaviour Research and Therapy found that holding one in mind while making eye movements left it feeling less vivid and less emotionally intense than simply picturing it.

The spiral also crowds out clear thinking itself. A 2016 meta-analysis of 177 samples in Psychological Bulletin found anxiety reliably shrinks working memory, the exact mental space you’d need to notice you could stop.

If one “what if” is deepening into a single, specific disaster, our guide to stopping catastrophizing covers that version directly. If your mind does this with everything, not just one worry, that’s closer to racing thoughts and overthinking. Either way, a spiral like this that visits often usually has roots in earlier experience, not just today’s trigger. Our guide to calming anxious feelings goes deeper on where a pattern like that tends to start.

How do you stop a “what if” spiral in the moment?

You don’t need an answer to every branch. You need to interrupt the climb.

Step 1: Name the one question. Not every branch, just the one at the root, the single “what if” actually running things right now. Say it as a full sentence. Rate how urgent or convincing it feels, 0 to 10.

Step 2: Run 3 to 5 rounds of bilateral stimulation. Bilateral stimulation (BLS) is the rhythmic, left-right technique at the center of EMDR (Eye Movement Desensitization and Reprocessing) therapy. Hold the question loosely in mind, more like watching it than living inside it, while you try one of these:

• Butterfly hug: cross your arms over your chest, hands on opposite shoulders, and tap left, right, left, right, slowly and steadily. EMDRIA describes this method as one built for people to use entirely on their own.
• Eye movements: pick two points about shoulder-width apart and move your gaze between them at a steady pace.
• Alternating taps: tap your knees or feet, left, right, left, right, while the question sits in the background.

A 2018 review of EMDR’s mechanisms in Frontiers in Psychology points to two things happening during BLS: it appears to occupy working memory, the same limited space your “what if” chain needs to keep climbing, and it’s linked to markers of lower physiological arousal. Run each round for 20 to 30 seconds, pause for a breath, then go again.

Step 3: Re-rate. Check your 0-to-10 number again. Most people notice the question feels quieter, more like one passing thought than an emergency.

Step 4: Ask a different question. Once the charge is down, swap “what if” for “what do I actually know right now.” It won’t resolve genuine uncertainty, but it gives your mind a smaller, answerable job instead of an infinite one.

Counting rounds mid-spiral is one more thing to track. EmEase, a self-guided EMDR app, runs the same left-right technique for you, a moving on-screen target or alternating tones, paced however you like, in the web app. Your own hands or eyes work just as well.

Does bilateral stimulation actually help with “what if” thinking?

There’s real evidence behind this, not just a borrowed technique. The clearest direct evidence involves generalized anxiety disorder, which is largely built from this exact pattern of excessive “what if” worry. A 2025 randomized controlled trial in Cognitive Therapy and Research gave 65 adults with GAD ten sessions of EMDR, delivered in person or by video, and found large drops in worry on the GAD-7 scale compared with a waiting list, with effect sizes of 1.90 and 1.59.

That’s strong evidence the technique eases this kind of worry. It isn’t proof about whatever your specific “what if” is asking about, and EmEase doesn’t diagnose or treat generalized anxiety disorder. Using it isn’t a substitute for the therapist-led sessions that trial describes. It’s a way to practice the same bilateral-stimulation technique for everyday “what if” spirals, on your own time.

When does a “what if” spiral need more than a quick reset?

This routine fits the ordinary version: a loud question, a spiral that eases once you interrupt it a few times. Some patterns are bigger than that.

• It doesn’t ease after a few rounds, or comes back within minutes of settling.
• It’s not really about one question anymore, just a steady hum of “what if” no matter what’s actually on your plate today.
• It’s costing you real things: avoided decisions, avoided calls, sleep that won’t come.
• Checking or reassurance-seeking is eating up real chunks of your day, not just an occasional rough hour.

If your loop keeps deepening into one specific worst case instead of branching outward, how to stop catastrophizing is built for that exact version. If it’s mostly about things you genuinely can’t control no matter how long you think about them, how to stop worrying about things you can’t control goes deeper on sorting that out. In any of these, a licensed therapist is a stronger next step than another round of self-guided resets. For more resets built the same way, our anxiety and stress relief hub has the full set.

Not one of your “what ifs” needs an answer tonight. Your mind just needs permission to stop climbing for a few minutes, and that’s something you can give it right now.