Pure O, is short for “Purely Obsessional OCD,” and refers to a subtype of Obsessive-Compulsive Disorder (OCD) primarily involving distressing intrusive thoughts (obsessions) without noticeable physical compulsions.

Are there any compulsions with Pure O?
While the term “purely obsessional” suggests no compulsions, it is slightly misleading as individuals often engage in mental or internal compulsions. These mental rituals can be challenging to recognize and define, yet they play a significant role in maintaining the sufferers’ distress and Pure O itself.
Symptoms of Pure O

Symptoms can vary widely but often include:
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- Intrusive Thoughts: Distressing thoughts related to physical and sexual harm, relationships, sexual orientation, religious topics or taboo topics.
- Mental Rituals: Internal actions like repeating phrases or numbers, checking feelings or thoughts, or constantly seeking reassurance.
- Functional Impairment: These obsessions and rituals can disrupt daily life, leading to severe emotional distress.
Examples of Pure O Mental Compulsions
Individuals with Pure O may engage in internal mental behaviors such as:
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- Checking feelings or bodily sensations—for instance, verifying emotional attachment to a partner or reactions to an intrusive thought.
- Reassuring themselves repeatedly to confirm they are a good person or their thoughts aren’t true.
- Repeating phrases or numbers silently in their mind.
- Overanalyzing or ruminating about a problem or thought to neutralize its impact.
Causes of Pure O

The exact causes remain unclear, but contributing factors may include:
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- Biological Factors: Differences in brain function or structure.
- Genetics: Certain genetic traits may increase susceptibility to OCD.
- Family History: Having relatives with OCD can raise the likelihood of experiencing Pure O.
Treatment Options for Pure O

Effective treatment often combines psychotherapy and medication:
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- Cognitive-Behavioral Therapy (CBT): Addresses intrusive thoughts and mental compulsions. At CBT Clinic London, our team specializes in tailored CBT approaches to help individuals break free from the distressing cycles of Pure O.
- Exposure and Response Prevention (ERP): A technique designed to help confront difficult internal states without engaging in mental or physical compulsions. ERP is usually a component of a CBT Therapy treatment plan for Pure O.
- Medication: Selective serotonin reuptake inhibitors (SSRIs) and other antidepressants may provide symptom relief.
Seeking Support for Pure O
Pure O can be deeply distressing, but it’s important to remember that help is available. At CBT Clinic London, we provide evidence-based care in a safe and non-judgemental environment. We have successfully treated many patients who suffer with Pure O.
What aspects of Pure O thoughts (intrusions) do our Private CBT Therapists specialise in treating?
Harm – Pure O
POCD – Pure O
HOCD- Pure O
ROCD – Pure O
If you’re seeking a private CBT therapist, our expert team is here to guide you through every step of the recovery process, offering both online and face-to-face therapy options.
Take the first step toward emotional resilience and reclaim control of your life today.