For many struggling with Obsessive Compulsive Disorder (OCD) and severe anxiety, Exposure and Response Prevention (ERP) is considered the gold-standard intervention. When a lot of people begin ERP for their OCD or anxiety treatment, they ask the question, “Why do I need to deliberately expose myself to some of my most feared triggers?” A valid question, as it takes a lot of courage and motivation to expose yourself to your biggest fears voluntarily. It’s only natural and biologically wired into us that we would want to avoid these triggers to keep ourselves safe. What happens, though, when your brain wires you to become afraid of things that are not actually life-threatening?
We have all had this experience, whether it’s fear of public speaking, fear of finding a spider in your home, or maybe fear of being in small enclosed spaces like elevators. Logically, we can tell ourselves that none of these things will actually harm us, but it often takes a while for our brains to catch up. We will explore how a few essential components of ERP help our brains rewire.
Avoiding Discomfort
We all avoid discomfort. Not starting a work project until the last minute because we know we will feel stress, or not attending a dinner with your family when you know there will inevitably be awkward questions about your dating life, are examples of how we try to avoid discomfort day to day. In the context of OCD, avoidance may look like refusing to cut vegetables with kitchen knives if you experience harm OCD, or not going outside to take a walk because you know that you will have to participate in a very time- consuming ritual cleaning of yourself and your belongings when you get back home.
What happens, though, when we continuously avoid our anxiety triggers? We may feel relieved for a moment, but chances are, that trigger will eventually present itself again. When we avoid these triggers to prevent discomfort, we may believe we are trying to do what is best for ourselves, but what if we were actually making the anxiety worse?
That’s what happens when we choose this avoidance route. A study published in the Indian Journal of Psychiatry in 2019 researching ERP for OCD found that avoidance reinforces a person’s fear and results in stronger obsessions and compulsions (Hezel & Simpson, 2019). This is because when you avoid what you fear, you are essentially telling your brain that this stimulus is worth being anxious about and that it is truly dangerous. This causes your brain’s alarm systems to go off whenever you’re around this stimulus, often creating a stronger fear loop over time. You can read more about ERP and this avoidance cycle in our blog “What is Exposure and Response Prevention (ERP)?”
Engaging in Uncertainty
To stop avoiding discomfort, we must be able to sit with uncertainty. Sounds scary, right? That’s because we usually are not taught to do this. Most of our lives, we learn to manage anxiety by thinking logically and being certain about outcomes.
We try to find proof that things can’t realistically harm us. Another way to put it is that we make sure we are not in any real danger. Most of us can remember a time when we told our parents that we were scared to fall asleep because we thought there may be a monster under our bed. To calm us, what did most parents do? They checked under the bed to assure us that there was no monster. In this example, that certainty helped reduce anxiety because it reassured us we were safe.
As much as we believe that this will be helpful in the context of OCD and severe anxieties or phobias, the research shows otherwise. Engaging in these compulsions and safety behaviors to feel certain makes fears worse. We don’t allow our minds to learn that these intrusive thoughts aren’t harmful and don’t require action to keep us safe.
Systemic Habituation
When we overcome this avoidance and open ourselves to uncertainty, something called systemic habituation can happen. Systemic habituation dismantles intrusive thoughts through a passive, internal process. It is said to have occurred “when fear elicited by a stimulus has decreased” (Benito & Walther, 2015). For example, you might step into the ocean on Memorial Day after a long winter in the Northeast. The water is freezing at first. Slowly, though, your body adjusts to the temperature and may register it as mildly cold, or even warm, rather than freezing like you first thought.
Your brain also undergoes a process called extinction, where the learned behavior gradually weakens and eventually disappears when the original conditions are removed (ScienceInsights, 2026). In terms of anxiety and OCD, this means that after the association between the intrusive thoughts and their original, and often terrifying, meaning your brain creates is weakened, the compulsive and safety behaviors are weakened too.
In ERP, you are allowing yourself to face the feared stimulus without acting on any safety behaviors to reduce the anxiety. Over time, this practice results in the anxiety naturally decreasing on its own. Your brain learns that the stimulus (the intrusive thought) is not something to fear or something that needs to be prevented. Once you subconsciously come to this realization, you will feel little to no anxiety and therefore not feel the need to complete compulsive behaviors to keep yourself safe.
Moving Forward
Engaging in ERP can be really frightening at first, but it is essential in overcoming our severe anxieties. Through ERP, we can become stronger and more resilient by allowing our brains to rewire. We eventually learn that these scary and intrusive thoughts causing immense anxiety no longer have a hold on us.
