WRITTEN BY
Justin La Rose, RP, M.Psy is a Registered Psychotherapist (RP, M.Psy) and Clinical Director of The OCD Clinic in Toronto. He has worked in mental health for more than 25 years and has spent over a decade in clinical practice, specializing in treating OCD with Exposure and Response Prevention (ERP).
Clinical examples in this article are composites. Any identifying client details have been changed and anonymized to protect confidentiality.
Everyone has disturbing thoughts. The difference is how much meaning you give them. People with OCD get stuck because they care too much, not too little.
The people who struggle most are the most moral. Hyper-responsibility, perfectionism, and deep concern for others are what make these thoughts so distressing.
Your thoughts don't define you. Having a thought about harm doesn't make you harmful. Having a thought about something "wrong" doesn't make you wrong.
Fighting the thoughts makes them stronger. Research proves that suppressing thoughts increases their frequency - creating the exact cycle that keeps you stuck.
This is highly treatable. 6-8 in 10 people who complete ERP see significant improvement. The thought that terrifies you most is the one that responds best to treatment.
WHY THESE THOUGHTS FEEL SO TERRIBLE
Let's be honest about what we're dealing with. Intrusive thoughts in OCD aren't mild worries. They're often the most disturbing content your mind can produce: thoughts about hurting people you love, sexual content that violates your values, blasphemous ideas if you're religious, images of catastrophic things happening because of something you did or didn't do.
These thoughts feel terrible because they go directly against who you are. They target the things you care about most. And that's not a coincidence.
OCD is a fear disorder that latches onto what matters to you most - not a reflection of hidden desires, but a hijacking of your threat detection system that interprets your own thoughts as dangerous. If you're a loving parent, you get thoughts about harming your child. If you're devoted to your partner, you get doubts about whether you really love them. If your faith is central to your identity, you get blasphemous images you can't shake.
The thoughts feel like evidence of something dark inside you. They're not. They're evidence of how much you care.
THE PROFILE OF SOMEONE WHO STRUGGLES
Here's what I've observed across more than 25 years in mental health. The people who struggle most with intrusive thoughts share a specific profile:
Hyper-responsibility. You feel personally responsible for preventing bad things from happening - even things outside your control. If something goes wrong, you assume it's somehow your fault.
Extreme conscientiousness. You care deeply about doing the right thing. You hold yourself to high moral standards. The idea of being "bad" or hurting someone is intolerable to you.
Intolerance of uncertainty. You're uncomfortable not knowing for sure. "What if I am a bad person and just don't realize it?" That uncertainty is unbearable.
Fear of your own capability. You worry that bad things might happen and you won't be able to cope. Or worse - that you might be the cause.
Notice something? These aren't the traits of a bad person. These are the traits of someone with an overdeveloped moral compass. The shame that accompanies these thoughts is so overwhelming that most people suffer in silence for years, convinced that disclosing their inner world would confirm the terrible things they believe about themselves.
WHY "GOOD PEOPLE" GET THE WORST THOUGHTS
Rachman and de Silva's landmark 1978 study↗ changed everything we know about intrusive thoughts. They found that 80% of the general population experiences intrusive thoughts with content identical to clinical obsessions - including thoughts about violence, sex, and harm. Later studies with larger samples pushed that number above 90%.
This means the thoughts aren't the problem. Everyone has them. The question is: what happens next?
For most people, the thought arrives and leaves. They notice it, maybe feel a flicker of discomfort, and move on. For someone with OCD, the thought arrives and sticks. The brain's threat detection system misfires - a vulnerability rooted in genetics, temperament, and learned behavioral patterns that together explain why some people develop OCD while others with identical thoughts do not. The amygdala screams: This is important. This means something. You need to do something about this.
And so the compulsion cycle begins - analyzing, checking, seeking reassurance, mentally reviewing - all in a desperate attempt to prove that the thought doesn't mean what it feels like it means. This is exactly what people with Harm OCD experience: the intrusive image of violence arrives, and the person spends hours mentally checking whether they "wanted" it, avoiding knives, avoiding their own children, building a life around a thought that has no bearing on reality.
THE INTRUSIVE THOUGHT CYCLE
Why the thought keeps coming back - and why your response is the problem, not the thought itself.
WHAT OCD TELLS YOU vs. WHAT'S ACTUALLY TRUE
THE THOUGHT SUPPRESSION TRAP
Here's the cruel irony that keeps OCD locked in place: the harder you try to get rid of a thought, the more it comes back.
This isn't a metaphor. Wegner and colleagues (1987)↗ demonstrated this with their famous "white bear" experiment. They asked participants to try not to think of a white bear. The result? Participants who tried to suppress the thought experienced it more frequently than those who were told to think about it freely. The suppression produced the very obsession it was supposed to prevent.
This is exactly what happens with OCD. You have a disturbing thought. You try to push it away. The effort of pushing it away keeps it active in your mind. It comes back. You push harder. It comes back stronger. You develop rituals - mental checking, reassurance-seeking, analyzing - to manage the thought. The rituals temporarily reduce anxiety. The thought returns. The cycle tightens.
Your brain isn't broken. It's following the rules of thought suppression exactly as research predicts. The problem isn't the thought - it's the strategy you're using to deal with it.
WHAT ACTUALLY KEEPS YOU STUCK
It's not the thought that keeps you stuck. It's what you do in response to the thought. The compulsions - both visible and invisible.
The visible compulsions are the ones people recognize: washing, checking, arranging. But the invisible ones are often more powerful. Mental reviewing: replaying the moment to check if you "really" felt something bad. Reassurance-seeking: asking your partner "Am I a good person?" for the fourth time this week. Thought neutralizing: following a "bad" thought with a "good" one to cancel it out. Avoidance: steering around situations where the thought might occur.
Every one of these compulsions feeds the myth that the thought is meaningful - that it requires a response, that you need to figure it out, that certainty is possible and necessary. It's not. The thought is noise. The compulsion is the signal your brain uses to keep the cycle alive.
Glazier and colleagues (2013)↗ found that even mental health professionals misidentify OCD symptoms 38.9% of the time - with misdiagnosis rates climbing dramatically for what researchers call "taboo thoughts." These are exactly the kinds of thoughts you're afraid to disclose: sexual obsessions, violent images, blasphemous impulses. The very thoughts that are most clearly OCD are the ones most likely to be misunderstood - by therapists and by the person experiencing them.
HOW INTRUSIVE THOUGHT OCD IS TREATED
ERP - Exposure and Response Prevention - is the treatment with the strongest evidence base for OCD, backed by over 40 years of research showing 6-8 in 10 people who complete ERP achieve significant improvement. For intrusive thoughts, ERP works by reversing the suppression trap: instead of pushing the thought away, you deliberately approach it - and resist the compulsion that follows.
This sounds counterintuitive. It sounds terrifying. And at first, it is. But it works because it teaches your brain something it can't learn any other way: this thought is not a threat that requires a response.
Talk therapy - exploring why you have the thought, analyzing its origins, processing your feelings about it - doesn't work for OCD because it keeps you engaged with the thought's content instead of changing your relationship to it. The change happens when you stop responding to the thought, not when you understand it better.
WHAT TO DO NEXT
If you've been carrying these thoughts alone - checking yourself for signs of badness, replaying moments to make sure you didn't do something wrong, avoiding situations that trigger the thoughts - you don't have a character flaw. You have OCD. And OCD is treatable.
If you're looking for OCD treatment in Toronto or virtual ERP therapy anywhere in Ontario, finding a therapist who specializes in ERP specifically for intrusive thoughts is the single most important step you can take. Not someone who "treats OCD" among 30 other specialties - someone who does this work every day and has heard the thoughts you're afraid to say out loud.
The thought that terrifies you most is the one that responds best to treatment. That's the paradox of intrusive thought OCD: the worse it feels, the more treatable it is. Because the very fact that it horrifies you proves it's ego-dystonic - proves it's OCD - proves it can get better.
You're not too broken. You care too much. And that's something we can work with.
5 SIGNS YOUR INTRUSIVE THOUGHTS ARE OCD (NOT WHO YOU ARE)
- The thoughts horrify you - they contradict your deepest values.
- You can't stop analyzing what the thought means about you.
- You've started avoiding situations where the thought might occur.
- You seek reassurance from others - or from yourself - that you're not a bad person.
- The more you try to push the thought away, the more it returns.
I've heard the thoughts you're afraid to say out loud. Across more than 25 years in mental health, nothing a client has told me has shocked me - and nothing has changed how I see them. What I see is someone with a treatable disorder who's been carrying this alone for too long.
Book Free Consultation →- Rachman, S., & de Silva, P. (1978). Abnormal and normal obsessions. Behaviour Research and Therapy. PubMed↗
- Wegner, D. M., Schneider, D. J., Carter, S. R., & White, T. L. (1987). Paradoxical effects of thought suppression. Journal of Personality and Social Psychology. PubMed↗
- Pascual-Vera, B., Akin, B., Belloch, A., Bottesi, G., Clark, D. A., Doron, G., et al. (2019). The cross-cultural and transdiagnostic nature of unwanted mental intrusions. International Journal of Clinical and Health Psychology. PubMed↗
- Glazier, K., Calixte, R. M., Rothschild, R., & Pinto, A. (2013). High rates of OCD symptom misidentification by mental health professionals. Annals of Clinical Psychiatry. PubMed↗
- Rosa-Alcazar, A. I., Sanchez-Meca, J., Gomez-Conesa, A., & Marin-Martinez, F. (2008). Psychological treatment of obsessive-compulsive disorder: A meta-analysis. Clinical Psychology Review. PubMed↗
- Response rates among treatment completers across randomized controlled trials (Foa et al., 2005; Law & Boisseau, 2019). Individual results vary. Foa et al. (2005)↗; Law & Boisseau (2019)↗