You're chopping an onion and your brain, unprompted, offers: what if you just stabbed yourself? Or you're standing on a subway platform and it whispers you could jump. Or you're holding a friend's newborn and a thought arrives so ugly you'd rather die than say it out loud. You put the knife down. You step back from the yellow line. And later, alone, you type "is it normal to have disturbing thoughts?" into your phone, because you can't imagine asking a person.
Here's the answer, up front, no hedging: yes. Intrusive thoughts are normal. When a research team led by Concordia University's Adam Radomsky studied unwanted intrusive thoughts in university students across six continents, they found these thoughts nearly everywhere they looked, in people with no diagnosis of anything. A horrifying thought doesn't mean you secretly want it to happen. It doesn't mean you're dangerous, or hiding something from yourself. It means you have a human brain, and human brains generate junk.
The interesting question isn't whether you're normal. You are. The interesting question is why a mind would produce content its owner finds repulsive, and why that content sticks like a burr while pleasant thoughts drift through untouched.
The headcount that should have been front-page news
Radomsky's study is one of my favorite pieces of psychology research, partly because of what it quietly demolishes. For decades, disturbing unwanted thoughts were mostly discussed in the context of OCD, which left everyone else assuming their intrusions were rare and sinister. Then researchers actually asked ordinary people around the world, and the coverage summed it up plainly: most people, not just OCD patients, have unwanted thoughts. Thoughts about harm. About contamination. About doubting whether you locked the door, or whether you're a good person at all.
So the raw material is universal. What differs between someone who shrugs off an intrusive thought and someone who spirals is not the thought. The Cleveland Clinic's explainer makes the same point clinicians keep making: what matters is how much distress and meaning you attach to the thought, not its content. Two people can have the identical flash of what if I swerved into traffic. One thinks brains are weird and keeps driving. The other grips the wheel, starts monitoring themselves for further evidence, and avoids the highway for a month.
Same thought. Wildly different aftermath. The aftermath is the part you can actually work with.
Please do not think about a white bear
Seriously, try it. For the next ten seconds, whatever you do, don't picture a white bear.
How'd that go?
The late Harvard psychologist Daniel Wegner turned that little parlor trick into a research program, and the finding held up: deliberately suppressing a thought makes it come back more often, not less. He called it ironic process theory. Part of your mind is busy pushing the thought away while another part has to keep checking whether the thought is gone, which means scanning for the exact thing you're trying to avoid. The monitoring is the invitation.
This explains the cruelest feature of intrusive thoughts: the harder you fight one, the more it visits, and the more it visits, the more it feels significant. If it keeps coming back, it must mean something. No. It keeps coming back because you keep checking whether it left. Persistence is a mechanical side effect of suppression, not a message from your true self.
Which also means "just stop thinking about it" is possibly the worst advice in the entire genre of well-meaning advice. You can't white-knuckle a thought out of existence. You can only stop treating it as an emergency.
Why it feels like a confession
But here's the thing nobody tells you at 2am: the horror you feel is actually evidence in your favor.
There's a cognitive bias with a clunky name, thought-action fusion, where the brain treats having a thought as morally equivalent to acting on it, or believes thinking something makes it more likely to happen. Under that logic, the flash of what if I hurt someone I love lands with the moral weight of having done it. You feel guilty for a crime that consists entirely of neurons firing. It's a bias, not a verdict. Thinking about a bank robbery has never once robbed a bank.
And notice what your intrusions are actually about. They're almost never random. The gentle person gets violent images. The devoted new parent gets thoughts about the baby getting hurt. The faithful partner gets what if I don't really love them. As BBC Science Focus puts it, these thoughts tend to collide with your values rather than express them, which is precisely why they register as alarming instead of boring. Your threat-detection system flags whatever would be most catastrophic to you. A person who genuinely didn't care about hurting others wouldn't be shaken by the thought. The distress is your character showing, not failing.
Add stress and the volume goes up. The Anxiety & Depression Association of America describes these thoughts as a byproduct of an ordinary brain doing ordinary background scanning, not a report on who you are, and anxious seasons make that scanner louder. It's a bit like feeling dread right when things are going well — an alarm system being overeager, not prophetic.
The thing shame can't survive
What gives an intrusive thought its power is secrecy. As long as it lives only in your head, unexamined and unspoken, it can feel like a monster in a locked room. You never get the corrective experience of putting it into words and noticing that the world doesn't end, that the sentence is just a sentence.
This is one reason I think saying things out loud matters so much, and honestly it's part of why we built Joice. Some thoughts feel too heavy for a blank page and too embarrassing, we assume, for a friend. Speaking them to a listener that won't flinch or quietly reassess your character lets you hear the thought as what it is: a weird artifact of a busy mind, not a secret about your soul. There's decent evidence that the benefit of journaling comes from putting feelings into words at all, not from any particular medium. A frightening thought, spoken plainly, tends to shrink.
One honest caveat before I let you go. If intrusive thoughts are eating hours of your day, or you've built rituals and avoidances around them, that's the territory where it's worth talking to a professional — not because the thoughts mean something dark, but because OCD and related conditions are very treatable and you don't have to grind through it alone. Getting help for a stuck brain is the same category of act as getting a cast for a broken wrist.
For everyone else, which the research says is nearly everyone: your brain will hand you something awful again, probably soon. When it does, skip the fighting and the 2am search bar. Try a small internal nod instead: huh, there's one of those. Then let it sit, unfought, like a white bear you've decided not to chase out of the room. It leaves faster when nobody's guarding the door.