How long does it take to treat OCD with ERP?
Written by the clinical team at The Lyceum Clinic. Clinically reviewed by Sanah Younis, Founder and Clinical Director, BABCP-accredited (no. 1000792). Published 28 October 2026. Last reviewed 28 October 2026.
Clinical perspective: The Lyceum's specialist therapist in OCD.
How is a hierarchy built?
It is 100% collaborative. We list every avoided situation and rate it from 0 to 100 (SUDS). The therapist doesn't dictate it; the client does. A good first step is something sitting around a 40 or 50, hard enough to provoke a real sweat, but manageable enough that they won't dissociate. If they pick something too hard and end up 'white-knuckling' (surviving without learning, or doing mental rituals to cope), we drop down a step. ERP must involve *learning*, not just endurance.
What do you say to someone who has had ERP before and it did not hold?
'I am guessing you did the physical exposures, but the therapist never taught you how to stop the mental reviewing afterward, or you never planned for the 'stealth return' during a stressful life event. ERP isn't a cure that makes the thoughts disappear forever. It's a skill. Your muscles just atrophied. We are going to hit the gym again and tighten up the mental boundaries.'
For more detail, read about OCD therapy.