OCD

Obsessive-Compulsive Disorder (OCD) is a cycle of unwanted, intrusive thoughts, images, or urges (obsessions) and the rituals, mental acts, or reassurance (compulsions) used to neutralize the distress they cause.

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How it can show up

  • Intrusive, unwanted thoughts that feel disturbing or “not like me”
  • Compulsions: checking, washing, counting, repeating, or mental reviewing
  • Seeking reassurance or googling to feel certain
  • Avoiding triggers that set off the thoughts
  • Knowing the fear may be excessive but feeling unable to resist the ritual

What is OCD?

OCD affects people across every theme: contamination, harm, “just right” feelings, relationships, religion, and taboo intrusive thoughts. The intrusions themselves are common to almost everyone; in OCD, it’s the catastrophic meaning attached to them, and the effort to neutralize them, that creates the disorder.

What keeps OCD going?

Cognitive models (Salkovskis, 1985; Rachman, 1997) show that OCD is maintained not by the intrusive thought but by how it’s appraised, often through an inflated sense of responsibility and a need for certainty. Compulsions and reassurance bring momentary relief, which powerfully reinforces them and teaches the brain that the danger was real and the ritual is what kept you safe.

How therapy helps

Exposure and Response Prevention (ERP) is the gold-standard, first-line treatment for OCD, recommended by clinical guidelines worldwide. We build a personalized hierarchy and gradually face triggers while resisting compulsions, so your brain learns the feared outcome doesn’t occur and the anxiety settles on its own. Learn more on the ERP page.

How the Unified Protocol can help with OCD

The Unified Protocol (UP) addresses OCD using the same core mechanism that makes ERP effective: gradually facing feared situations without performing compulsions or rituals, so your nervous system learns that the distress settles on its own. In the UP, this process is called Countering Emotional Behaviours (CEB).

What the UP adds is a broader emotional lens. Rather than treating compulsions purely as habits to break, the UP understands them as emotional coping strategies: ways of managing the distress that intrusive thoughts produce.

A case example in Barlow & Farchione (2018) illustrates this well. A patient's tapping rituals were not simply repetitive behaviours, but attempts to control the overwhelming feelings triggered by intrusive blasphemous and contamination thoughts. By working with the emotional experience underlying the rituals, not just the rituals themselves, the treatment became more personal and meaningful.

Case example from Barlow & Farchione (2018) — Applications of the Unified Protocol

The UP is especially well-suited when OCD co-occurs with other emotional challenges such as perfectionism, health anxiety, or low mood, since the same treatment framework addresses all of these together rather than requiring separate protocols for each concern.

Adult evidence: the Barlow et al. (2017) trial

The most rigorous adult evidence comes from a large equivalence trial published in JAMA Psychiatry (Barlow et al., 2017) involving 223 adults, 35 of whom had OCD as their main diagnosis.

63%
of OCD participants responded to the UP (Farchione et al., 2012)
≈ ERP
equivalent symptom outcomes to dedicated ERP at posttreatment & 6-month follow-up
Lower
dropout from the UP compared to ERP (Barlow et al., 2017)
  • Both UP and ERP significantly outperformed the waitlist condition
  • Gains were maintained at 6-month follow-up for both treatments
  • Open trials across the US, Japan, and Spain (combined n=61) have provided additional support

Why the UP may help beyond symptom relief

One of the more interesting findings from the UP research is that it produces greater reductions in emotional sensitivity than symptom-focused protocols like ERP (Sauer-Zavala et al., analysis of Barlow et al., 2017 data).

Emotional sensitivity refers to the underlying tendency to react intensely to distressing thoughts and feelings. This is what fuels OCD in the first place. The UP targets it directly, rather than working symptom by symptom. This may explain why the UP works particularly well when OCD is part of a broader emotional picture, which is the case for most people with OCD.

Treatment gains from the UP were also maintained at 3-year follow-up, suggesting the benefits hold long after treatment ends.

Adolescent OCD: Milgram et al. (2025)

For younger clients, the UP-C/A (developed by Ehrenreich-May and colleagues) applies the same approach adapted for adolescents, using language centred on managing strong emotions. This is particularly valuable given that up to 80% of young people with OCD also experience another emotional difficulty such as anxiety or depression.

A large study (Milgram et al., 2025) tracking 388 adolescents through UP-C/A found:

  • Anxiety and depression improved significantly in the first half of treatment
  • OCD symptoms caught up in the second half, reaching comparable improvement by the end
  • This reflects how the exposure-focused work in later sessions tends to be where OCD specifically shifts

Clinicians working with OCD-primary young people are encouraged to bring exposure language in earlier and to frame the treatment's opposite-action exercises as a form of ritual prevention, in line with the Barlow & Farchione (2018) approach.

Frequently asked questions

What is the best treatment for OCD?

Exposure and Response Prevention (ERP), a specialized form of cognitive-behavioural therapy, is the gold-standard, first-line treatment for OCD and is recommended by major clinical guidelines.

Are intrusive thoughts a sign something is wrong with me?

No. Unwanted intrusive thoughts are extremely common and are not a reflection of your character or intentions. In OCD, the problem is the distress and the meaning attached to them, not the thoughts themselves.

Does talking therapy alone treat OCD?

General talk therapy is usually not sufficient for OCD. The evidence strongly supports ERP (actively and gradually facing triggers while resisting compulsions) as the most effective psychological treatment.

Selected clinical references

The approach to this concern is informed by established clinical models and treatment guidelines, including:

  1. Salkovskis, P. M. (1985). Obsessional-compulsive problems: A cognitive-behavioural analysis.
  2. Rachman, S. (1997). A cognitive theory of obsessions.
  3. Foa, E. B., & Kozak, M. J. (1986). Emotional processing of fear: Exposure to corrective information.
  4. NICE (2005). Obsessive-compulsive disorder and body dysmorphic disorder (CG31).
  5. Farchione, T. J., et al. (2012). Unified Protocol for Transdiagnostic Treatment of Emotional Disorders: A Randomized Controlled Trial. Behavior Therapy, 43(3), 666–678.
  6. Barlow, D. H., et al. (2017). A unified protocol for transdiagnostic treatment of emotional disorders: A randomized controlled trial. JAMA Psychiatry, 74(9), 875–884.
  7. Barlow, D. H., & Farchione, T. J. (Eds.). (2018). Applications of the Unified Protocol for Transdiagnostic Treatment of Emotional Disorders. Oxford University Press.
  8. Milgram, J., et al. (2025). OCD symptom trajectories in youth receiving the Unified Protocol for Children/Adolescents (UP-C/A).