He checks the stove six times before leaving the house. Then he checks it again, because he is not sure the sixth time counted. By the time he reaches his car, the doubt has returned: what if he missed something? He goes back inside. He knows, logically, that the stove is off. He also knows that if he does not check, the anxiety will follow him all day. Every check brings a few minutes of relief, and every bit of relief makes the next urge to check a little stronger.
Obsessive-compulsive disorder (OCD) can be exhausting, isolating, and deeply misunderstood. Fortunately, it is also highly treatable. One of the most effective approaches is a form of cognitive behavioural therapy called Exposure and Response Prevention, or ERP. This post explains how OCD works, what ERP involves, why it can be so effective, and what to expect if you are considering it.
How the OCD cycle works
OCD involves two main parts:
Obsessions are unwanted, intrusive thoughts, images, urges, or doubts that cause intense distress. They often focus on themes such as contamination, harm, responsibility, morality, relationships, sexuality, religion, or a feeling that things are not "just right."
Compulsions are behaviours or mental acts a person feels driven to perform to reduce that distress or prevent something bad from happening. These might include washing, checking, counting, repeating, seeking reassurance, mentally reviewing, praying in a particular way, or avoiding certain situations.
Compulsions bring short-term relief. That relief is exactly what keeps OCD going. Each time a compulsion lowers anxiety, the brain learns that the obsession was dangerous and that the compulsion was necessary. Over time, the cycle can grow stronger and take up more and more of a person's life.
It is important to know that having intrusive thoughts is a normal part of being human. Almost everyone has strange, upsetting, or out-of-character thoughts from time to time. In OCD, the difference lies in how much distress those thoughts cause and how strongly a person feels compelled to neutralize them. Intrusive thoughts in OCD are typically experienced as unwanted and contrary to a person's values, which is part of why they are so upsetting.
What ERP is
Exposure and Response Prevention has two parts:
Exposure means gradually and deliberately approaching the thoughts, images, objects, or situations that trigger obsessional fears.
Response prevention means choosing not to perform the compulsion or safety behaviour that usually follows.
Together, these steps help break the cycle. Instead of escaping discomfort through a compulsion, a person learns, through direct experience, that they can tolerate uncertainty and distress, and that the feared outcome often does not happen, or is far more manageable than OCD predicted.
Why ERP works
ERP has a strong research base. In a well-known clinical trial of adults with OCD, intensive ERP produced stronger results than the medication clomipramine on its own, and all active treatments outperformed placebo (Foa et al., 2005). Canadian clinical practice guidelines recommend cognitive behavioural therapy, including ERP, as a first-line treatment for OCD (Katzman et al., 2014).
Researchers have also refined their understanding of how exposure works. Earlier models focused mainly on habituation, the idea that anxiety naturally decreases with repeated exposure. More recent research suggests that a key process is inhibitory learning: the brain does not simply erase the old fear but learns a new, competing association, such as "I can handle this" or "this is not as dangerous as I thought" (Craske et al., 2014). This has practical implications. For example, it can be helpful to practise exposures in different settings, to notice when predictions do not come true, and to build tolerance for uncertainty rather than waiting for anxiety to disappear completely.
What ERP looks like in practice
ERP is collaborative and gradual. It is not about being thrown into your worst fear on the first day.
Understanding your OCD. Your therapist will first help you map out your obsessions, compulsions, triggers, and avoidance. Many people are surprised to discover compulsions they had not recognized, such as mental reviewing or asking loved ones for reassurance.
Building a hierarchy. Together, you create a list of situations that trigger anxiety, ranked from mildly uncomfortable to very difficult. Exposures usually start lower on the list.
Practising exposures. In sessions and between sessions, you gradually approach items on your hierarchy while resisting the urge to perform compulsions. For someone with contamination fears, this might begin with touching a doorknob and waiting before washing. For someone with checking compulsions, it might mean locking the door once and walking away. For someone with intrusive harm thoughts, it might involve writing the feared thought down or holding a kitchen knife while cooking, always in a way that has been planned and agreed upon in advance.
Reducing reassurance and accommodation. Reassurance-seeking is a common compulsion. ERP often includes gently reducing reassurance from yourself and from others. Family members may be invited to learn how to support recovery without unintentionally feeding the OCD cycle.
Moving up the ladder. As confidence grows, exposures gradually become more challenging. You stay in control of the pace, and your therapist works with you to keep the process manageable.
Common myths about ERP
"It's just forcing yourself to face your fears." ERP is structured, gradual, and agreed upon together. It is never meant to be done in a way that feels coercive.
"It's too hard for me." ERP is challenging, but it is designed to be done in steps that feel difficult but doable. Many people find the short-term discomfort worthwhile for the long-term freedom it brings.
"It means I'll have to act on my thoughts." ERP never involves doing anything harmful. Exposures to intrusive harm thoughts focus on the thoughts themselves, not on acting on them.
"I can do it on my own." Some people find self-help resources useful, especially for milder symptoms. However, OCD can easily hijack self-directed exposure, turning it into another ritual. Working with a therapist trained in ERP can make a significant difference.
ERP alongside other support
ERP may be combined with medication, often a type of antidepressant prescribed by a physician or psychiatrist, particularly for moderate to severe OCD. Some therapists also integrate approaches such as acceptance and commitment therapy (ACT) to help people relate differently to intrusive thoughts. Decisions about treatment are best made with your health care team.
When to reach out for support
It may be worth speaking with a professional if intrusive thoughts or compulsions are taking up significant time, causing distress, affecting your relationships, work, or daily life, or leading you to avoid people, places, or activities. If you are experiencing distressing intrusive thoughts after having a baby, please know that this is common and treatable, and reach out to your health care provider. If you are having thoughts of suicide, please reach out right away.
Reflection questions worth exploring
These prompts are best explored with a professional rather than used to reach conclusions on your own.
What thoughts or situations do I find myself avoiding?
What do I feel I must do to get rid of uncomfortable thoughts or feelings?
How much time do these thoughts and behaviours take up in my day?
How do my loved ones get pulled into reassuring me or helping with rituals?
What would I do with my time and energy if OCD had less of a hold on me?
Support at Vive Wellness Therapy
At Vive Wellness Therapy, we understand how exhausting and isolating OCD can be, and how much courage it takes to begin facing it. We offer a compassionate, collaborative space to understand your OCD, explore evidence-based approaches such as ERP, and move at a pace that feels manageable for you. If you would like support, we would be glad to hear from you whenever you feel ready.
References
Craske, M. G., Treanor, M., Conway, C. C., Zbozinek, T., & Vervliet, B. (2014). Maximizing exposure therapy: An inhibitory learning approach. Behaviour Research and Therapy, 58, 10–23. https://doi.org/10.1016/j.brat.2014.04.006
Foa, E. B., Liebowitz, M. R., Kozak, M. J., Davies, S., Campeas, R., Franklin, M. E., Huppert, J. D., Kjernisted, K., Rowan, V., Schmidt, A. B., Simpson, H. B., & Tu, X. (2005). Randomized, placebo-controlled trial of exposure and ritual prevention, clomipramine, and their combination in the treatment of obsessive-compulsive disorder. American Journal of Psychiatry, 162(1), 151–161. https://doi.org/10.1176/appi.ajp.162.1.151
Katzman, M. A., Bleau, P., Blier, P., Chokka, P., Kjernisted, K., Van Ameringen, M., & the Canadian Anxiety Guidelines Initiative Group on behalf of the Anxiety Disorders Association of Canada/Association Canadienne des troubles anxieux and McGill University. (2014). Canadian clinical practice guidelines for the management of anxiety, posttraumatic stress and obsessive-compulsive disorders. BMC Psychiatry, 14(Suppl. 1), S1. https://doi.org/10.1186/1471-244X-14-S1-S1
This article is provided by Vive Wellness Therapy for general informational and educational purposes only. It is intended to be used alongside professional therapy and medical care and is not a substitute for assessment, diagnosis, or treatment by a qualified health professional. Exposure-based treatment is best undertaken with a trained professional. Research and clinical guidance evolve over time, and information in this article may become outdated or contain inaccuracies. If you are in crisis or thinking about suicide, call or text 9-8-8 (Suicide Crisis Helpline, available 24/7 across Canada; in Quebec, calls connect to 1-866-APPELLE). If you or someone else is in immediate danger, call 9-1-1 or go to your nearest emergency department.
