You’re driving on the highway and suddenly think, ‘What if I just swerved into oncoming traffic?’ You grip the steering wheel tighter, and your heart races. You feel panic even though you have no desire to crash. The thought came out of nowhere and left you shaken. You wonder what it says about you.
These moments can feel upsetting. Maybe even shameful. You might ask yourself:
- Why do I think scary things?
- Why do I have unwanted thoughts that feel disturbing?
- Am I broken for even having them?
You’re not broken. These thoughts are more common than you think. And there are gentle, research-supported ways to understand what’s happening inside.
What Are Intrusive Thoughts, and Are They Normal?
Intrusive thoughts are sudden, unwanted mental experiences. They might be thoughts, images, or urges that feel inappropriate, frightening, or even wrong. You don’t choose them. You don’t want them. They just show up.
It may be hard to believe, but studies show that intrusive thoughts are a normal part of being human. A large global study found that more than 94% of people experience these thoughts, no matter their mental health history [1].
You might think: But mine are worse. That’s the tricky thing about intrusive thoughts. They feel incredibly personal. But you’re not alone in them.
Impulsive vs Intrusive Thoughts: What’s the Difference?
These two types of thoughts sound similar, but they’re not quite the same.
Impulsive thoughts are urges. They come with a quick burst of energy. Like the sudden urge to shout during a quiet moment, or to jump into a cold lake without warning.
Intrusive thoughts are more like mental images or scary “what ifs.” You don’t want them. They often repeat. They feel invasive.
Both can feel intense. And both show up more often in people who experience anxiety, trauma, OCD, or related conditions. But they also happen to people with no diagnosis at all.
The most important thing to remember: having a thought is not the same as acting on it. You can think something distressing and still know it doesn’t reflect who you are.
Why Do These Scary Mental Health Triggers Happen?
Your brain is built to protect you. Its main job is to look out for danger. Even when there isn’t any, it might still send out alerts.
This is especially true if you live with anxiety or have a sensitive nervous system. Your brain may jump to “worst-case” thoughts more easily. It’s not trying to scare you. It’s just trying (a little too hard) to keep you safe.
There’s also something called thought-action fusion. It’s when you feel guilty just for thinking something bad, even if you never act on it. But thinking something doesn’t make it true. And it definitely doesn’t mean it will happen [2].
Intrusive Thoughts Don’t Mean Something Is Wrong With You
Some thoughts can feel so vivid or disturbing that it’s hard to believe they’re “just thoughts.” But they are. Many people carry silent shame, thinking a scary thought means they’re bad or broken.
This isn’t true. Even people living with conditions like OCD or depression experience intrusive thoughts without acting on them. Research shows that thoughts and actions are separate. You can have an idea, acknowledge it, and let it go. Studies have shown that conscious thought doesn’t fully control behaviour, and the unconscious mind often operates independently, initiating and guiding actions without needing conscious input [3].
You are not your thoughts.
What Makes Intrusive Thoughts Feel Worse?
Some conditions can make these thoughts more frequent or harder to shake:
- Lack of sleep or rest
- High levels of stress or anxiety
- Past trauma or emotional pain
- Trying to fight or suppress the thoughts
Ironically, trying to force a thought away often makes it return stronger. It’s like saying, “Don’t think about a pink elephant.” Your brain immediately thinks of one.
Studies show that when people try to suppress disturbing thoughts, those thoughts tend to linger longer and feel more intense. A well-known example is the “white bear” experiment, which demonstrated that the more someone tries not to think about something, like a white bear, the more likely it is to resurface in their mind [4].
A Gentle Way to Respond
Instead of fighting these thoughts, try to meet them with softness.
- Notice the thought and say to yourself, “That’s just an intrusive thought.”
- Remind yourself that a thought is not a fact.
- Come back to your body. Feel your feet on the ground. Take a slow breath in and out.
- Let the thought drift away. You don’t need to chase it or judge it.
This kind of gentle awareness can help lower the emotional pressure. Over time, it allows the brain to learn that these thoughts don’t need a full alarm.
When It’s Time to Talk to Someone
If intrusive or impulsive thoughts are taking up space in your day, affecting your sleep, or leaving you anxious or numb, therapy can help.
At MindShift Integrative Therapy Centre, we support people who feel overwhelmed by unwanted thoughts. You don’t have to wait until things feel unmanageable. You deserve support now. Our therapy options include Individual Therapy, Teen Therapy, and Anxiety Therapy.
These approaches don’t aim to erase your thoughts. They help you create space, gain tools, and feel safe again in your own mind.
Sources:
- Gannon, M. “Most People Have Unwanted, Worrying Thoughts”, Live Science, 2014. https://www.livescience.com/44687-most-people-have-unwanted-thoughts.html
- Kelly, O., PhD. “How Can I Stop OCD Thoughts?” Verywell Mind, 2023. https://www.verywellmind.com/how-can-i-stop-ocd-thoughts-2510498?
- Masicampo, E. J., Baumeister, R.F. “Conscious thought does not guide moment-to-moment actions—it serves social and cultural functions” National Library of Medicine, 2013. https://pmc.ncbi.nlm.nih.gov/articles/PMC3724120/
- Bayley, P.J., Levy, D.A., Mamat, Z. “Reconsidering thought suppression and ironic processing: implications for clinical treatment of traumatic memories.” National Library of Medicine, 2024. https://pmc.ncbi.nlm.nih.gov/articles/PMC11669253/
