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Starting ERP for OCD? Read This First

  • Jul 19
  • 7 min read


Exposure and Response Prevention (ERP) is an evidence-based form of CBT and the recommended psychological treatment for OCD. It involves gradually facing intrusive thoughts, situations, images or feelings that trigger OCD while resisting physical and mental compulsions. This article explains three important things to understand before starting ERP: why anxiety does not need to disappear for ERP to be working, why finding ERP difficult is not a sign of failure, and why effective treatment is about more than repeatedly doing exposures.



If you've been told that Exposure and Response Prevention (ERP) is the recommended treatment for your OCD, you might be feeling hopeful, apprehensive, or perhaps a mixture of both. You may have read that it involves deliberately facing your fears without doing compulsions, or perhaps you've already started ERP and found yourself wondering whether you're doing it "right".


If any of that sounds familiar, you're certainly not alone. ERP is considered the gold-standard psychological treatment for OCD, with decades of research supporting its effectiveness. Yet despite this, it's often one of the treatments that people feel most anxious about before they begin, and one of the most misunderstood. Understanding what ERP is actually trying to achieve can make the whole process feel much less daunting. So before you begin (or even if you've already started), here are three things I think everyone should know.



Prefer to watch?

I've also created a video explaining these three principles. If you'd rather watch first, you can do that below. If you prefer reading, simply keep scrolling.




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1. Don't Expect Anxiety to Disappear Quickly


One of the biggest misconceptions about ERP is that success is measured by how quickly your anxiety comes down, and it's easy to see why people think this. If you're deliberately facing something that makes you anxious, it seems logical to assume that the goal is to feel less anxious and calmer afterwards.


Sometimes that's exactly what happens, but sometimes it isn't. For many years, ERP was understood through what is known as the habituation model. The idea was that if you stayed with an exposure for long enough, your anxiety would naturally reduce. While habituation can certainly occur, our understanding of how ERP works has evolved considerably over the years. We now know that something even more important is taking place.


What's actually happening is that your brain is learning something new. It's learning that you can experience anxiety, uncertainty, fear or disgust without immediately responding with a compulsion. It's also learning that OCD doesn't have to dictate what you do next. ERP creates opportunities for your brain to discover that the catastrophic outcomes OCD predicts either don't happen at all, or aren't as devastating as OCD convinced you they would be.


If you've ever wondered why OCD predictions can feel so believable in the first place, you may find my article: → Why Do OCD Thoughts Feel So Real? helpful. This shift in learning is one of the reasons ERP can be so effective. It also explains why anxiety isn't always the best way to judge whether an exposure has been successful.


So rather than asking yourself:


"Did my anxiety come down?"

Try asking:


"What did I learn from this experience?"

That subtle shift in perspective can completely change how you judge your progress.




2. Finding ERP Difficult Doesn't Mean You're Doing It Wrong


ERP is difficult, and that has nothing to do with how well you're doing it. It's difficult because it asks you to respond in ways that go directly against the habits OCD has been reinforcing, sometimes for many years. Experiencing OCD often means spending a long time convinced that checking is necessary, reassurance is essential, analysing is responsible, or that compulsions (whether physical or mental) are the only way to keep yourself or other people safe.


It's easy to think of compulsions as things you can see, like checking or washing. But many compulsions happen entirely in the mind, such as analysing, mentally reviewing, trying to work things out or reassuring yourself. These mental compulsions can keep OCD going just as effectively as physical compulsions. If reassurance has become part of your OCD, you might also find my article: → Reassurance Seeking in OCD helpful. Similarly, if you notice yourself endlessly analysing or mentally replaying situations, you may also like to read: → Rumination vs Problem Solving.


ERP asks you to practise doing something different - of course that's uncomfortable. In fact, if ERP feels challenging, effortful or emotionally uncomfortable, that's often a sign that you're engaging in exactly the kind of learning the approach is designed to create. Alongside the fact that ERP asks you to behave differently, something else can catch people by surprise:


Sometimes OCD gets louder.

The intrusive thoughts may feel more frequent, the doubts more convincing, or the urge to carry out a compulsion stronger than ever. This can be incredibly discouraging, and it's very easy to conclude that therapy is making your OCD worse. Whether your OCD centres around existential fears, relationships, harm/taboo, or another theme entirely, this temporary increase in symptoms can happen across many different presentations of OCD.


Often, though, this increase isn't a sign that ERP isn't working. It's OCD upping the ante. For perhaps the first time in a long while, you aren't responding to OCD in the way you usually have. Recovery doesn't come from waiting for OCD's demands to stop - it comes from learning that you don't have to do what those demands tell you to do.




3. ERP Isn't About Constantly Doing Exposures


When people hear the word exposure, it's usually the part of ERP they focus on, and often the part they worry about the most. Many people imagine they'll be expected to throw themselves into their biggest fear as quickly as possible. But effective ERP doesn't work like that. It isn't about overwhelming yourself, pushing through at any cost or starting with the hardest exposure on your list. Good ERP is collaborative, planned and gradual.


Together with your therapist, you'll usually develop what's known as an exposure hierarchy (I often call it a fear ladder). This simply helps you build confidence step by step, starting with situations that are challenging enough to promote learning without becoming so overwhelming that they're impossible to engage with.


But there's another part of ERP that's just as important, and it's often overlooked: Response Prevention.


People sometimes assume that the exposure is where all the work happens. It isn't. Much of the learning happens afterwards. You face the trigger and then choose not to carry out the compulsion. Whether that's checking, seeking reassurance, mentally reviewing, analysing, or trying to work out whether you're "okay", response prevention is where lasting change begins.


Because that's the point where your brain starts learning that you don't have to obey OCD's demands.



Final Thoughts


Starting ERP can feel daunting, especially if you've only heard the headlines. But good ERP isn't about throwing yourself in at the deep end, forcing your anxiety to disappear, or getting every exposure perfect. It's about gradually learning that intrusive thoughts, uncertainty, anxiety and even disgust don't have to dictate your actions or the life you choose to live.


It’s important to know that this learning takes time. There will almost certainly be difficult days along the way. But understanding what ERP is trying to achieve before you begin can make the whole process feel much less frightening.




Need help with ERP?


If you're looking for professional support with ERP, you can find out more about my ERP Therapy for OCD here → Get help with ERP.


Prefer to browse first? Explore my Resources page for videos and tools.




FAQs about ERP for OCD:


Exposure and Response Prevention (ERP) is a specialised form of Cognitive Behavioural Therapy (CBT) and is considered the gold standard psychological treatment for OCD. It involves gradually facing situations, thoughts, images or feelings that trigger OCD whilst resisting the urge to carry out compulsions. Over time, this helps your brain learn a different way of responding to uncertainty and intrusive thoughts.

There isn't a simple answer, as everyone's OCD is different. Factors such as the severity of your symptoms, how long you've experienced OCD, the types of compulsions involved, and how consistently you're able to practise all influence progress. Some people notice meaningful changes within a few weeks, whilst for others it takes longer. Recovery is usually gradual rather than sudden.

ERP is one of the most effective psychological treatments we have for OCD and has been shown to significantly reduce symptoms for many people. Rather than "curing" OCD, the aim is to change your relationship with intrusive thoughts and compulsions so that OCD no longer dictates your choices or limits your life.

That doesn't mean you've failed. ERP isn't about doing every exposure perfectly. Everyone slips back into compulsions from time to time. What matters is noticing what happened, understanding why it happened, and approaching it with curiosity rather than self-criticism. Recovery is built through repeated practice, not perfection.

Yes, although it often benefits from thoughtful adaptations. Increasingly, research and clinical experience suggest that ERP is most effective when sensory sensitivities, emotional regulation, executive functioning, processing style and individual learning needs are taken into account. The principles of ERP remain the same, but the way therapy is delivered should be tailored to the individual.

Some people are able to make progress using self help resources, particularly if their OCD is relatively mild. However, OCD is very good at disguising compulsions, especially mental compulsions, which can make self directed ERP difficult. Working with a psychologist or therapist who specialises in OCD and ERP can help ensure you're targeting the processes that are actually keeping your OCD going.






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