Guest Blog by Peter Klein- CBT for OCD: The Parts People Don't Talk About
When people picture OCD, they usually picture the visible stuff: hand-washing, checking locks, arranging objects. And when they picture CBT for OCD, they usually imagine a therapist helping someone "challenge their thoughts" — a calm conversation that talks the worry away.
The reality is different, and a lot of it goes unmentioned. The parts of OCD that cause the most suffering are often the quietest, and the parts of treatment that do the most work are rarely what people expect. Here are the ones I think deserve more airtime.
The compulsions you can't see
The classic image of OCD is a visible ritual. But a huge proportion of OCD happens entirely inside the head. Mental compulsions include:
Replaying conversations to check you didn't say something wrong
Reassurance-seeking: asking partners, friends, or Google the same question over and over
Silently counting, repeating phrases, or "neutralizing" a bad thought with a good one
Mentally reviewing the day to prove nothing bad happened
These are every bit as compulsive as hand-washing. They are driven by the same engine — anxiety relief — and they strengthen the OCD in exactly the same way. The difference is that nobody can see them, so the person suffers in private, often for years, without anyone realizing how much energy is being drained.
A related group of compulsions is harder still to spot because they involve paying attention rather than doing something. Sensorimotor OCD is the name for the hyper-awareness people develop around bodily sensations that are normally automatic: blinking, swallowing, breathing, or the feeling of their tongue resting in their mouth. The compulsion here is checking — constantly monitoring the sensation, testing whether it still feels "right," trying to get the awareness to switch off. It looks like nothing from the outside, which is exactly why it goes unnoticed for so long.
CBT for OCD is not "just challenging thoughts"
Here is a misunderstanding I run into constantly. People come to CBT expecting to be talked out of their fears, one rational argument at a time. That is not how CBT for OCD works, and it is important to know that going in — because trying to argue with an OCD thought tends to make it worse.
The gold-standard treatment is Exposure and Response Prevention (ERP), which is a specific form of CBT. It has two parts:
Exposure means deliberately facing the feared thought or situation, in a planned, graded way. If you fear contamination, that might mean touching a door handle and not washing. If your fear is intrusive thoughts, it might mean writing the thought down and reading it back.
Response prevention means choosing not to do the compulsion afterwards — not washing, not checking, not asking for reassurance, not mentally arguing with the thought.
ERP is not about proving the fear wrong. It is about teaching your brain, through experience, that the anxiety will rise and fall on its own, and that you can function even while the doubt is present. It is harder than talking about thoughts. It is also what actually changes the condition.
The shame is part of the problem
The thoughts that drive OCD are often violent, sexual, or blasphemous. People describe them as feeling like the worst version of themselves — thoughts about harming a child, about being a fraud, about losing control in public. The shame that follows is immense, and it does two harmful things: it stops people from seeking help, and it makes them hide the real content of their thoughts when they do.
This is one of the most important things a therapist can normalize. In OCD treatment, we have heard it all. The specific content of an intrusive thought matters far less than the mechanism behind it, and the mechanism — a thought that clashes with your values, triggering anxiety and compulsion — is the same whether the thought is about germs, God, or harm. Naming the thought out loud in a safe room is often the first big relief a client feels.
The family gets pulled in
OCD does not stay contained in one person. Partners and parents often get recruited as reassurance providers: "Did I lock the door?" "Am I a good person?" "Is this normal?" Answering feels kind, and it is — in the moment. But every reassurance given is fuel for the next cycle.
Modern OCD treatment increasingly involves families, teaching loved ones how to respond helpfully without feeding the loop. If you are the partner or parent of someone with OCD, you are not a bystander. You are part of the system, which means you can be part of the change.
Recovery is not a straight line
One of the least discussed truths about OCD treatment is that progress is messy. You will have good weeks and bad weeks. You will do an exposure that goes smoothly, then one that sends you spiraling. None of that means treatment is failing.
What predicts recovery is not the absence of setbacks. It is what you do after them: noticing, without judgment, that the old pattern showed up, and gently returning to the plan. People who recover are not the ones who never struggled. They are the ones who kept going back to the exposure, week after week, until the brain learned the new lesson.
Treatment works
This is the part I most want people to hear. OCD is one of the most treatable mental health conditions we know of. ERP has decades of research behind it, and it works whether delivered in person or online. The prognosis for someone who engages with treatment is genuinely good — not because the doubts disappear forever, but because the person stops being ruled by them.
If any of this sounds like you, or like someone you love, the kindest step is a conversation with a therapist who specializes in OCD. You do not need to have it all figured out first. You just need to start.
Peter Klein is a CBT therapist in London specializing in anxiety and OCD. He offers CBT for OCD in person, online and by phone.
