Clinically reviewed general information · Reviewed 2026-05-20
OCD and ERP: why an evidence-based treatment feels counter-intuitive
Exposure and Response Prevention is the gold-standard OCD treatment — and it asks you to resist the very behaviours that bring relief. Here’s why that works.
This article is general information for adults and families. It does not replace advice from your GP, psychologist or other treating clinician.
Obsessive-compulsive disorder is a treatable anxiety-spectrum condition — and one of the most misunderstood. An evidence-based treatment, Exposure and Response Prevention (ERP), has a strong evidence base but asks you to do the opposite of what your instincts demand. Here’s why, and how.
What OCD actually is
OCD is a cycle: an intrusive thought (obsession) generates intense anxiety, and a behaviour (compulsion) temporarily relieves it. The relief is real but brief — and it teaches the brain that the compulsion was necessary, strengthening the cycle. The content varies (contamination, checking, symmetry, intrusive harm or taboo thoughts) but the mechanism is identical.
Why reassurance makes it worse
The instinct — for the person and their loved ones — is to seek and provide reassurance. ‘Did I lock the door?’ ‘Yes you did.’ This relieves anxiety momentarily but functions exactly like a compulsion, feeding the cycle. One of the hardest parts of OCD treatment is helping families stop accommodating.
How ERP works
ERP deliberately exposes you to the trigger (the thought, the situation) while preventing the compulsion. Over repeated, graded exposures, the brain learns two things: the feared catastrophe doesn’t happen, and anxiety subsides on its own without the compulsion. This is called habituation, and it’s well-evidenced.
ERP is collaborative and graded — you build a hierarchy from least to most anxiety-provoking and work up at a pace you control. It’s challenging, but many people report meaningful improvement in 12–20 sessions.
What about medication?
SSRIs (often at higher doses than for depression) have good evidence for OCD and are frequently combined with ERP. This is a conversation for your GP or psychiatrist.
If OCD is part of your picture, look for a clinician with specific ERP experience. Our intake team can match you — 1300 084 200.
Clinical note
If symptoms are persistent, escalating or affecting safety, daily functioning or relationships, consider speaking with a GP or psychologist. If there is immediate danger, call 000.