OCD and intrusive thoughts: what a clinical psychologist does
OCD, obsessive-compulsive disorder, involves unwanted intrusive thoughts and the repetitive behaviours or mental rituals people use to reduce the anxiety those thoughts cause. A clinical psychologist assesses the pattern behind the thoughts and rituals, then works with you using evidence based approaches such as cognitive behavioural therapy, including exposure and response prevention, to reduce their grip.
What OCD and intrusive thoughts actually are
Obsessive-compulsive disorder, OCD, is built from two parts: obsessions and compulsions. Obsessions are intrusive thoughts, images or urges that arrive uninvited and cause distress, often because they clash sharply with what a person actually values. Compulsions are the actions, physical or mental, that follow: checking, washing, counting, repeating a phrase, seeking reassurance, or mentally reviewing a memory until it feels right. The compulsion brings short term relief and longer term reinforcement, which is part of why OCD can feel so hard to shift without help.
Intrusive thoughts on their own are common. Most people experience strange, unwanted or disturbing thoughts from time to time and dismiss them within seconds. What marks OCD out is not the content of the thought but the meaning attached to it, and the amount of mental or physical effort spent trying to neutralise it.
Why intrusive thoughts feel so sticky
The thoughts that cause the most distress in OCD are usually the ones furthest from what someone would actually want to do or believe. A new parent might have a sudden thought about harming their baby. Someone in a stable relationship might be gripped by doubt about whether they really love their partner. A thought about contamination might trigger hours of washing. The content varies, but the pattern is similar: the mind flags the thought as dangerous, the person tries to suppress, neutralise or check it away, and the effort to get rid of it makes it more prominent, not less.
How a clinical psychologist assesses OCD
An assessment usually starts with mapping the specific obsessions, compulsions and avoidance patterns involved, rather than treating OCD as a single fixed condition. Two people with an OCD diagnosis can look very different day to day. A clinical psychologist will ask about the thoughts that trigger distress, the rituals or mental strategies used in response, how much time these take, and what has been avoided as a result, such as certain rooms, objects, words or situations. This picture, sometimes called a formulation, shapes the treatment plan and gives both the psychologist and the client a shared understanding of what is maintaining the difficulty.
Treatment approaches: CBT and ERP
Cognitive behavioural therapy, CBT, is the approach most consistently recommended for OCD, and within CBT the specific technique with the strongest evidence base is exposure and response prevention, ERP. ERP involves gradually and deliberately facing the situations or thoughts that trigger obsessions, while resisting the compulsion that would normally follow. This is done in a structured, paced way, built collaboratively rather than imposed, starting with less distressing triggers and building up as confidence grows.
The logic behind ERP is straightforward even though the process itself takes real effort: compulsions keep OCD going by teaching the brain that the only way to cope with the thought is to act on it. Resisting the compulsion, with support, allows anxiety to fall on its own over time and breaks that cycle. Some clients also benefit from cognitive techniques that address the beliefs behind the compulsions, such as an inflated sense of responsibility for preventing harm, or the belief that having a thought makes it meaningful or dangerous.
What sessions look like, working online
Sessions are held online, which means the assessment, the formulation work and the ERP planning all happen over video call. For OCD specifically, working online can suit the exposure work well, since some of the situations that trigger compulsions, a kitchen, a front door, a phone, are already present in a person’s own home, making practice between sessions more direct. Clinical psychologists for Maidstone and Kent, working online with adults, offer this kind of structured, evidence based support without either party needing to travel.
Common OCD themes
OCD shows up in recognisable clusters, though any individual’s experience can combine several. Contamination based OCD centres on fears of dirt, illness or chemicals, and often involves washing or cleaning rituals. Checking OCD involves repeated verification, of locks, appliances or actions already taken, driven by doubt rather than genuine forgetfulness. Harm based OCD produces intrusive thoughts about causing injury to oneself or others, which are distressing precisely because they conflict with the person’s actual character. Relationship OCD centres on doubt about a partner or the relationship itself. Moral or religious OCD, sometimes called scrupulosity, involves intense guilt over perceived wrongdoing or blasphemy. None of these themes reflect what a person wants or intends to do. They reflect where the mind has attached threat.
When to consider getting help
Occasional intrusive thoughts do not need treatment. It is worth seeking an assessment when thoughts and the rituals used to manage them are taking up significant time each day, when avoidance is shrinking day to day life, such as avoiding certain rooms, people or routines, or when reassurance seeking from other people has become a regular pattern. A clinical psychologist can help establish whether OCD is the right description for what is happening, since intrusive thoughts also feature in other conditions, and can recommend an approach suited to the specific pattern involved.
We will update this site as the practice develops, but the assessment and treatment approach described here is available now, online, to adults across Maidstone and the surrounding Kent area, including Bearsted, Allington, Barming, Loose, Penenden Heath and Tovil.