Exposure and response prevention (ERP) is a psychological treatment used for OCD, usually within cognitive behavioural therapy (CBT). It involves approaching a relevant trigger while practising a different response to the urge to perform a compulsion. My experience of explaining ERP draws on more than 20 years of psychological work, including individual work with OCD and group psychoeducation. I focus on making both parts understandable: facing the trigger and reducing the ritual, including rituals carried out mentally. Read the OCD treatment guide for the wider treatment picture, or my professional background for my qualifications and experience.
If you have not already done so, you can use my OCD self-check to reflect on unwanted thoughts, compulsions and their impact. It is an educational starting point, not a diagnostic test.
To illustrate, one of my clients, Aoife, initially felt consumed by her fear of contamination. Through ERP, we started with small exposures—touching a clean surface without immediately washing her hands. Over time, she progressed to touching objects she once avoided entirely, like doorknobs and shopping trolleys, all while resisting the urge to ritualize. But the satisfaction for me, lay with the fact, that she could see exactly what was causing her problem and knew exactly what she had to fix it, she finally had a way out. This quick example with my client Aoife shows how ERP therapy for OCD can help with contamination OCD, one of the common subtypes of OCD, but it can be successfully applied to all sub-types. I’ll talk next about how it works, because at it’s most simple; it works due to two things – expose yourself to the thoughts or images that you have being trying to avoid, and don’t do the compulsion! If you master that, you will feel a lot better, but of course, there is more to it than that and I’ll go through it with you now, including what would happen in session. If you want to start now, try these ERP exercises you can do at home.
The plan keeps ordinary hygiene and relevant medical advice in place. It targets excessive rituals, not reasonable infection precautions.
ERP has basically two steps to master;
- exposure, and
- response prevention – hence the name of the model Exposure and Response Prevention.
Exposure: This involves intentionally facing the situations, thoughts, or sensations that trigger your anxiety in a safe and controlled way. Instead of avoiding these triggers, you gradually confront them. For example, if social anxiety makes you fear speaking in front of others, exposure might begin with saying a few words in a small, supportive group before progressing to larger audiences.
Response Prevention: This step helps you resist engaging in behaviours that provide temporary relief but maintain the anxiety over time. These behaviours, often referred to as compulsions or safety behaviours, can include actions like excessive reassurance-seeking, avoidance, or rituals. For instance, someone with health anxiety might avoid repeatedly checking their symptoms online or seeking constant reassurance from loved ones.
The key is to approach an appropriate trigger and practise leaving out the ritual. Agree what you will do and for how long; do not make a particular anxiety drop the test of success. You can learn while some discomfort remains.
Why Exposure and Response Prevention ERP Works
ERP helps you practise approaching appropriate triggers while reducing compulsions, including mental rituals. The goal is greater freedom to act without relying on compulsions, even when some anxiety or uncertainty remains. Anxiety may decrease during practice, but an immediate drop is not a requirement for learning. NICE guidance and the International OCD Foundation describe CBT with ERP as an established treatment for OCD.
Struggling most with uncertainty? Read the OCD need for certainty (‘just-right’ feeling).
Structure of ERP Therapy
Building a Fear Ladder
With your therapist, you’ll create a list of situations, activities, or thoughts that cause you anxiety, ranked from the least to the most distressing. This list, often called a “fear ladder,” helps guide your progress as you gradually work through each step at your own pace.
Real-Life Practice (In Vivo Exposures)
You’ll start facing real-life situations that trigger your anxiety, beginning with smaller challenges and building up to more difficult ones.For example, if public transport causes panic attacks, your first step might be sitting at a bus stop, followed by a short bus ride when you feel ready. If health anxiety makes you google symptoms obsessively, an exposure might involve resisting the urge to search online, starting with small timeframes and increasing as you go.
Imaginary Practice (Imaginal Exposures)
For fears that are harder to face directly, like catastrophic thoughts ( you can read more about catastrophic thoughts and CBT here), you and your therapist will work on creating vivid scenarios or scripts. By imagining these fears repeatedly, you’ll learn to reduce their emotional grip and feel more in control.
Breaking the Habit (Response Prevention)
The key to ERP is learning to resist the rituals or safety behaviours that temporarily reduce anxiety but keep it alive in the long run. For example:
- You might have contaminations fears, like my example with Aoife that I used above, in these case you might practice not washing your hands after touching a doorknob or only washing them for a specific amount of time or in a different way, as people with OCD can have quite elaborate ways to wash..
- For checking compulsions, you’ll gradually stop repeatedly checking appliances or door locks, even if it feels uncomfortable at first, or similar to the example before, reduce the amount of times you check.
Exposure is used in several anxiety treatments. ERP is particularly associated with OCD because response prevention directly targets compulsions. The plan and rationale should be adapted to the condition; not every anxiety exercise is interchangeable with an OCD ERP exercise.
- OCD: ERP is the gold standard treatment for OCD, helping individuals confront obsessions and resist compulsions. For a detailed guide on OCD and its treatment, visit our OCD resource page. For example, someone with contamination fears might touch a public door handle without washing their hands, gradually breaking the cycle of anxiety and compulsions. Not sure if your symptoms fit? Do I have OCD? (self-assessment)
- Panic Attacks: ERP might involve intentionally triggering mild sensations of panic, such as increased heart rate through light exercise, and learning to tolerate the discomfort without fear or avoidance. For more about panic attacks and therapy options, visit our page on panic attacks
- Social Anxiety: For those who fear embarrassment or rejection, ERP may involve exposures like making small talk with strangers or participating in group activities, while resisting behaviours such as rehearsing conversations or avoiding eye contact. Learn more about social anxiety and its treatment.
- Health Anxiety: Individuals with health anxiety often feel compelled to google symptoms or seek reassurance from others. ERP would involve resisting these behaviours and sitting with the discomfort of uncertainty about their health. Discover more about health anxiety and how ERP can help.
ERP is effective for different OCD subtypes, such as Relationship OCD (ROCD)
Finding an ERP Therapist in Ireland
Finding the right ERP therapist is an important step. Explore how to choose an OCD therapist and what questions to ask.
Here are some resources to help you find an experienced ERP practitioner in Ireland:
- The Irish Association for Counselling and Psychotherapy (IACP): The IACP has a directory of accredited therapists, many of whom specialize in CBT and ERP. You can search their directory by location and specialism to find a therapist near you. https://www.iacp.ie/
- The Psychological Society of Ireland (PSI): The PSI also has a directory of registered psychologists, including those with expertise in OCD and ERP. https://www.psychologicalsociety.ie/
- Your GP: Your GP can be a valuable resource in finding a qualified therapist. They can provide referrals and recommendations based on your needs.
- Online Directories: Websites like Psychology Today and therapist.ie allow you to search for therapists by location, specialism, and other criteria.
New to treatment? Start with what therapy works best for OCD.
Key Questions to Ask a Potential Therapist:
- Do you have specific experience in treating OCD with ERP?
- How long have you been practicing ERP?
- What is your approach to ERP?
- What are your fees?
- Do you offer online or in-person sessions?
Practical Tips for Starting ERP
- Find a Qualified Therapist: Look for a therapist with experience in ERP and OCD treatment. They will guide you through the process and tailor it to your specific needs.
- Start Gradually: Don’t try to tackle your biggest fear first. Begin with situations that cause mild anxiety and gradually work your way up.
- Be Patient and Persistent: ERP takes time and commitment. There will be ups and downs, but stick with it. The rewards are worth it.
- Practice Self-Compassion: Be kind to yourself throughout the process. It’s okay to feel anxious or frustrated. Remember, you’re learning new skills and rewiring your brain.
ERP can be challenging, but it’s a highly effective treatment for OCD. With the guidance of a skilled therapist and your own determination, you can reclaim your life from OCD.