We take a closer look at the thoughts and patterns often described as ‘Pure O’, and how they fit into obsessive compulsive disorder (OCD)

Have you ever had a thought that felt completely out of character – something that seemed to come from nowhere, and left you questioning yourself? For some people, these kinds of thoughts don’t pass. They can feel persistent, unsettling, and difficult to ignore, returning again and again in a way that brings feelings of anxiety, guilt, or self-doubt.

Often referred to as ‘Pure O’, this experience is commonly linked with obsessive compulsive disorder (OCD). While Pure O itself isn’t a clinical diagnosis, the term is used by many people to describe a form of OCD where intrusive thoughts are the most easily noticeable part. These intrusive thoughts can be upsetting – for example, you might worry about accidentally causing someone you love harm –  but it’s important to remember that having a thought doesn’t mean you will act on it, and it doesn’t define who you are.

Here, we explore more about Pure O, how it fits into OCD, and what kind of support is available. 

What is Pure O?

Pure O, sometimes called Pure OCD, is a term often used to describe a type of OCD where intrusive thoughts feel like the most noticeable part of the experience. Rather than visible rituals – where actions or behaviours may be repeated in an attempt to ease anxiety – many people describe their compulsions as happening internally. This could be mentally reviewing situations, seeking reassurance from themselves, or trying to ‘figure out’ what their thoughts mean. 

Because these compulsions are less obvious, it can feel like there are no compulsions at all, only distressing, intrusive thoughts. However, many OCD specialists highlight that these mental processes are still compulsions, even if they are harder to spot. 

It’s important to note that Pure O isn’t a clinical diagnosis. It’s not a term used widely by professionals to describe a separate type of OCD. Instead, it has grown through online communities and personal accounts as a way for those affected to explain and make sense of their experiences.

As OCDUK explains, a person with Pure O will still experience compulsions. Some may be internal, such as mental rituals, but there are often physical compulsions too, which is why some experts feel the term can be misleading. For example, an easily overlooked physical compulsion could include checking on Google for a specific answer or checking your own body’s reaction. You might seek reassurance from loved ones repeatedly, avoid particular objects, places, or people. They might not be something that more commonly comes to mind when you think of OCD, but they are all compulsions. 

While people may relate to the term Pure O, or find it helpful to describe how they experience, experts warn that the term can be unhelpful as it may lead people experiencing OCD to have difficulty recognising their own symptoms – the hidden compulsions that might be trickier to spot than more overt outward ones. This, in turn, can slow down their access to help, support, and journey towards recovery. 

At the same time, it’s important to acknowledge that language matters. For some, having a term like Pure O can feel validating – especially if their experience doesn’t match with more common understandings or stereotypes of OCD. Having a term that they can relate to can help them feel less alone and give them a starting point to talk about what they are going through. 

Understanding how OCD can show up in different ways is often the first step towards finding the right kind of help for you. 

The challenges of managing OCD and Pure O

The challenges of Pure O aren’t always visible from the outside, which can make it harder to recognise, understand, and talk about. One of the main difficulties is that compulsions are often internal. Things like rumination and mentally checking can be easy to miss, even for the person experiencing them. This can lead to confusion about what’s happening or uncertainty about whether what they are experiencing is OCD. 

Feelings of shame and stigma can also make it harder to reach out for support.  Because intrusive thoughts can feel upsetting or out of line with a person’s values, sharing them with others may feel difficult – sometimes leading to a sense of isolation.

When symptoms are less visible or harder to spot, it can take longer to access the right support. Over time, you might notice safety behaviours developing. These could be things like avoiding situations or seeking reassurance, as a way to cope with how you are feeling. While these can feel helpful in the moment, they can keep the cycle going and can make it harder to seek support. 

Recognising these patterns can be an important first step. With the right support, it’s possible to better understand intrusive thoughts and find ways to manage them – helping to break the cycle and feel more in control.

Finding help for Pure O and OCD 

If intrusive thoughts are starting to feel overwhelming, it may be a sign that some extra support could help. OCD – including experiences often described as Pure O – does have many different kinds of treatment to help manage symptoms and how they impact your life. 

Many people find that understanding what’s happening is a helpful first step. Talking with others as part of online or local support groups can be a good way to connect with people with similar experiences. Some people find this validating and can help them to feel more comfortable seeking support and opening up about their thoughts, feelings, and experiences. OCD Action and OCD UK both offer support groups, or you can find out more about what local support groups may be available in your area by asking your GP or a mental health professional.  

Talking therapies such as cognitive behavioural therapy (CBT) are commonly recommended, with specific approaches like exposure and response prevention (ERP) often used to support people with OCD. Other methods, such as cognitive defusion, work towards creating a space between yourself and your thoughts, helping you to see thoughts as mental events rather than facts. 

As Counselling Directory member, Dr Michael Swift, Integrative Psychologist, explains, “Instead of seeing thoughts as accurate representations of reality or as commands that must be obeyed, cognitive defusion helps individuals to see thoughts as mere mental events, passing ideas that do not necessarily have any bearing on reality.

“The key idea is that thoughts are not facts. For someone with Pure O, this can be a liberating realisation. For instance, having a thought about harming someone does not mean that the individual will actually harm someone or even want to. It’s just a thought, and like all thoughts, it will pass if it’s not given undue attention.”

Working with a qualified, experienced therapist who specialises in OCD can help you to understand your thoughts and how they may be affecting you, to break unhelpful patterns, and to find new ways of coping with underlying feelings that might be affecting you.

In some cases, medication may be recommended by your GP or mental health professional to help ease symptoms. 

Alongside professional support, small, everyday steps can also make a difference. This could include learning more about how OCD works, gently noticing patterns in your thoughts, or practising self-compassion when things feel difficult. 

If any of this feels familiar, you’re not alone. Intrusive thoughts can feel isolating, but many people experience them – and support is available. There’s no right or wrong place to begin. Simply being here, learning more, or starting to recognise patterns in your thoughts is a meaningful step.

When you feel ready, opening up to someone you trust – whether that’s a friend, loved one, your GP, or a counsellor – can help you feel supported and understood. With time, understanding, and the right support, things can begin to feel lighter – and change, in its own time, is possible.