Spotting OCD: Understanding Symptoms for Effective Therapy
Introduction: A Real Moment from the Clinic
So, picture this. I’m sitting across from a new client in my Edinburgh practice. They’re fidgeting, nervous. They’ve been told they might be bipolar. Or maybe it’s anxiety. Or even psychosis. Their GP wasn’t sure. They’ve Googled themselves into a spiral and now they’re here, hoping for clarity. And you know what? They’re not alone. So many people feel confused, mislabelled, or misunderstood when it comes to mental health.
That’s exactly why I made sure to attend — virtually — the 30th Annual OCD Conference in Chicago this year. One session stood out: “Diagnostic Detectives: Picking OCD Out of the Lineup.” Even from across the ocean, it was brilliant. We dove deep into what makes OCD different from all those other conditions it’s so often mistaken for. And today, I want to walk you through it like we’re just having a chat over coffee.
Why Is OCD So Tricky to Spot?
Let’s be honest — OCD is a master of disguise. It wears many faces, and sometimes even the people living with it don’t realise what’s really going on. I’ve sat with so many clients who’ve come in thinking they’re losing their mind — that maybe they’re a danger to others, or secretly broken, or unfixable. And it’s heartbreaking, because what they’re actually describing are classic OCD symptoms.
One client I remember well — let’s call her Sarah — came in convinced she might be developing schizophrenia. She had these vivid, unwanted thoughts about harming her partner. She’d never hurt a soul, but the thoughts made her feel like a monster. Her GP thought it might be depression, or even psychosis. But when we really unpacked it, it became clear: these were intrusive thoughts. And her distress over them? That was the giveaway. She didn’t want them. She was terrified of them. That’s OCD through and through.
The trouble is, OCD doesn’t always manifest in the handwashing or cleaning behaviours people expect. Sometimes it hides in the mind — with checking, doubting, moral fears, or mental rituals no one else can see. And if you’re not trained to notice those more subtle versions, it’s easy to chalk it up to general anxiety, or say, “Everyone worries, right?”
But OCD worry is different. It’s sharper. It hooks into your values and twists them. It tells you, “You might be a bad person. You need to be 100% sure you’re not.” And people will spend hours mentally reviewing conversations, googling symptoms, seeking reassurance, or avoiding loved ones — all in secret.
Unless you know what to ask and how to listen between the lines, OCD can hide in plain sight. And that’s the part that hurts the most — because the right treatment, like ERP therapy, works. But misdiagnosis can leave people stuck for years, thinking they’re beyond help. They’re not. They just need someone to see the full picture.
Ego-Dystonic vs Ego-Syntonic: What Does That Even Mean?
Here’s a big one we learned in the session — and honestly, it’s one of the most eye-opening things for people trying to make sense of their mental health. OCD thoughts are usually ego-dystonic. That means they go against who you are. They crash into your mind like an unwanted guest, uninvited and loud. You know they’re wrong. You hate them. And yet, they won’t stop showing up.
I’ve had clients break down in tears over these thoughts — not because they believe them, but because they’re terrified that having the thoughts at all might mean something dark about them. One client — I’ll call him Tom — once told me, “I’m scared I’m secretly a bad person.” When we explored why, it turned out he had intrusive thoughts about shouting offensive things in public. He never acted on them. He didn’t want to. But the thoughts haunted him, and he believed they meant he was dangerous. They didn’t. They meant he had OCD.
Now, ego-syntonic thoughts are the opposite. These are the thoughts that feel like they belong — like they’re in line with your values, even if they’re a bit extreme. People with certain personality disorders, or during manic episodes, might experience this. For example, someone with obsessive-compulsive personality disorder (OCPD) might think, “My way is the right way, and everyone else is just disorganised.” There’s no distress about the thought — just frustration that others can’t keep up.
This difference — between ego-dystonic and ego-syntonic — is huge. It’s the reason why someone with OCD is more likely to seek help. They’re suffering. They want the thoughts to stop. It’s the difference between “I hate these thoughts, they scare me” and “I believe this is the way things should be.”
And for anyone out there struggling, here’s the thing: if your thoughts feel wrong, scary, or out of character, you’re not alone. You’re not broken. You might just be dealing with OCD. And that means there’s help, and hope, and a path forward.
OCD vs Psychosis: One of the Most Confusing Crossroads
Both can involve strange, disturbing thoughts. But the key difference? Reality testing.
People with psychosis lack insight. Their beliefs are fixed. People with OCD know their thoughts are irrational — even if that doesn’t stop the anxiety. That insight, however shaky, is a massive clue.
Harm OCD vs Suicidality: A Life-Saving Distinction
Someone might say, “I keep thinking about stabbing someone I love.” Sounds dangerous, right? But in OCD, those thoughts are intrusive and unwanted — and cause intense distress.
In suicidality, there’s intent or a wish to act. With OCD, the person is terrified of acting and goes to great lengths to avoid doing harm. It’s a vital distinction that helps us avoid unnecessary hospitalisations.
Perinatal OCD: The Most Misunderstood
Affects 2–3% of new parents, often mistaken for postnatal depression or GAD. The obsessions might involve harming the baby, intrusive sexual thoughts, or contamination fears — but because they’re so taboo, sufferers often stay silent.
Getting the correct diagnosis — and ERP therapy — can be life-changing.
OCPD vs OCD: Personality vs Disorder
This is another one of those comparisons that sounds simple on paper but gets murky in real life. Obsessive-Compulsive Personality Disorder (OCPD) and Obsessive-Compulsive Disorder (OCD) share some similar-sounding names — but emotionally, they’re worlds apart.
People with OCPD are typically perfectionistic and orderly. But here’s the thing — they don’t usually see it as a problem. In fact, they often feel pretty proud of their standards. They might believe that there’s a “right” way to do everything, and that if everyone else just followed their lead, the world would run a lot more smoothly. One client I worked with, we’ll call him David, would get incredibly frustrated when his team at work didn’t format documents in the exact font and spacing he preferred. To him, it wasn’t controlling — it was correct. That’s ego-syntonic thinking: it feels right, comfortable, even righteous.
Now contrast that with OCD, which is usually ego-dystonic. People with OCD are often in emotional pain. Their thoughts scare them. Their behaviours don’t feel like choices — they feel like survival. I had a client, Emily, who felt compelled to check the stove repeatedly before leaving the house. She knew it was off. She hated how long it took to get out the door each morning. But the anxiety she felt if she didn’t check was overwhelming. She wasn’t proud of the ritual. She was exhausted by it.
That’s the core emotional difference. People with OCPD often resist help because they don’t believe there’s anything wrong with how they operate — even if it’s causing conflict or isolation. People with OCD, on the other hand, are usually desperate for relief. They know something’s off. They just feel stuck.
Understanding this difference is crucial because the treatment approaches aren’t the same. While both can benefit from therapy, someone with OCD will usually respond well to Exposure and Response Prevention (ERP). In contrast, OCPD might need a deeper exploration of beliefs, rigidity, and control.
So, if you’ve ever wondered, “Am I just a perfectionist, or is this OCD?” — the answer lies in how it feels to you. Is it something you want to do, or something you can’t stop doing, even when it hurts? That’s the question worth sitting with.
GAD vs OCD: Real vs Irrational Worry
Here’s where things often get muddled — and understandably so. Generalised Anxiety Disorder (GAD) and OCD both involve worry. But the flavour of that worry? It’s worlds apart.
GAD worry is like a constant hum in the background. It’s usually about real-life things: money, relationships, work, health. It’s the kind of worry that might keep someone up at night, going over tomorrow’s schedule or obsessively checking if their rent has gone through. It’s excessive, yes, but still grounded in everyday life. I’ve had clients with GAD describe it as feeling like they can never fully relax, like their brain always has a tab open in the background.
OCD, though? OCD worry is sharp, irrational, and often incredibly specific. It’s not just “I hope my partner is okay.” It’s “What if I ran over someone without noticing, and now I’ve destroyed a family?” It’s “If I don’t say this phrase in my head perfectly, something bad will happen to my mum.” It’s fears that don’t make logical sense — but feel completely real in the moment. And what makes OCD so different is the compulsion that follows. It’s the mental rituals, the checking, the need to neutralise the fear.
One young man I worked with would blink hard every time he saw a red light. Why? Because he had a belief — totally irrational — that if he didn’t do it just right, something terrible would happen to his sister. He knew it didn’t make sense. But the fear was so intense, he couldn’t not do it. That’s OCD.
The biggest emotional weight with OCD is often the shame. People feel like they should be able to ‘logic’ their way out of it. But logic doesn’t work on OCD. That’s why differentiating it from GAD is so important — because the treatment approach needs to fit the problem. And once it does? That’s when people finally start to feel like themselves again.
ADHD vs OCD: Chaos or Control?
This is one of the most common areas of confusion I see in both children and adults. ADHD and OCD might sound like total opposites — and in many ways, they are — but the overlap can be surprisingly tricky to tease apart.
ADHD is all about movement and distraction. People often describe their brains as noisy, chaotic, and always jumping from one thought to the next. They might forget appointments, struggle to sit still, or find it nearly impossible to stay on one task for long. I once had a teenage client tell me, “It’s like I’m trying to watch five different shows on five different TVs at the same time — and I’ve lost the remote.”
Now, OCD, on the surface, can look like the polar opposite. It’s meticulous. It’s slow. It’s repetitive. Someone with OCD might take twenty minutes to leave the house because they’re checking the lock over and over again, or re-reading a message for the tenth time to make sure it doesn’t offend anyone. It’s not about a lack of focus — it’s about too much focus on the wrong things. A kind of mental tunnel vision.
But here’s the twist: you can have both. I’ve seen kids who couldn’t finish homework because they were distracted (ADHD), but when they did manage to write, they kept erasing every word to make it “just right” (OCD). The two conditions collided. It wasn’t laziness or defiance — it was a brain tug-of-war between chaos and control.
And this matters so much, especially when it comes to treatment. Up to 20% of children with OCD also have ADHD. The challenge is that the usual medications for ADHD — especially stimulants — can sometimes make OCD symptoms worse. It’s like turning up the volume on those obsessive thoughts. That’s why it’s essential to get the diagnosis right.
When we understand what’s really going on, we can build a treatment plan that supports both needs — helping someone manage attention and reduce compulsions. Because no one should have to battle both noise and fear alone. There’s a way through it, with the proper support.
Bipolar Disorder vs OCD: Insight Is Key
This is one of those areas where the waters can get very muddy, very fast. Bipolar disorder and OCD might seem unrelated at first glance, but in reality, they can and do coexist — and when they do, it creates a whole new layer of complexity.
Let’s start with the basics. Bipolar mania is loud. It’s impulsive, restless, full of energy, sometimes even euphoric or agitated. People might go on spending sprees, talk at a mile a minute, or sleep only a few hours without feeling tired. One client once told me, “It felt like I was on top of the world — but my brain wouldn’t shut up.”
Now, OCD is the opposite in many ways. It’s rigid. It’s fearful. It’s full of doubt. Thoughts in OCD are intrusive and unwanted. They’re not energising — they’re exhausting. Someone with OCD might say, “I know this thought doesn’t make sense, but I can’t stop thinking about it.” The keyword here? Insight. People with OCD usually know their fears are irrational — and that causes them distress.
But what happens when the two collide? It happens more often than you might think. Research shows that around 17–18% of people with either bipolar disorder or OCD will experience both. And in those cases, one condition can easily overshadow the other.
I worked with a client who had been diagnosed with bipolar disorder for years. She was on mood stabilisers, and they helped — somewhat. But there was still something missing. She’d spend hours mentally rehearsing conversations, terrified she might’ve offended someone, or obsessively rewriting emails late into the night. These weren’t manic behaviours. They were compulsions. Underneath the mood swings, OCD had been there all along — unnoticed.
Here’s the thing: if we miss the OCD and treat only the mood disorder, we leave half the battle untouched. But if we rush into treating OCD without stabilising mood first, we risk triggering a manic episode. That’s why it’s so important to tread carefully.
When we take the time to truly understand what someone is experiencing — not just the diagnosis on paper — we can tailor support in a way that actually helps. And that’s when real healing begins.
Autism Spectrum Disorder vs OCD: Repetition, But Why?
Both involve routines or repetitive behaviours. But in ASD, they’re soothing or based on fascination. In OCD, they’re about avoiding catastrophe or neutralising anxiety.
Also, ASD behaviours are usually not distressing. OCD compulsions often are.
Delusions vs Obsessions: Fixed vs Flexible
This is one of those subtle but vital distinctions that can completely change the direction of someone’s treatment. I’ve had clients come to me after being told they might be delusional, simply because their thoughts sounded bizarre or extreme. But when we sat down and talked it through, what they were describing weren’t fixed beliefs — they were intrusive thoughts that filled them with fear and shame. That’s a key difference.
Delusions are fixed, unshakable beliefs. They don’t budge, even when presented with evidence to the contrary. Someone might believe they’re being watched by the government through their toaster, or that they’re secretly royalty — and no amount of gentle questioning or proof can shift that belief. There’s no insight. The belief feels true and justified, no matter how outlandish it might sound to others.
Now let’s talk about obsessions. These are the hallmark of OCD — unwanted, intrusive thoughts that go completely against a person’s values. People with OCD are usually distressed by their thoughts. They know something feels off. They might say things like, “I know it’s not logical, but what if it’s true?” or “I’m scared this thought means something bad about me.”
One client, James, once confided in me that he had repetitive thoughts about harming a stranger on the street. He was horrified by them. He avoided walking near people, avoided knives in the kitchen, and even considered quitting his job to stay away from crowded places. But he didn’t believe he wanted to harm anyone. He was terrified that the mere thought meant he was dangerous. That’s obsession, not delusion. Understanding that allowed us to begin exposure and response prevention (ERP), which changed his life.
Insight is the big divider here. Even when someone with OCD is really struggling, there’s usually at least a flicker of awareness — a part of them that knows, deep down, “This isn’t me.” That recognition, even if it comes and goes, is everything. It opens the door to therapy. It invites trust and healing.
So, if you’re battling with thoughts that scare you — thoughts you wish would just disappear — you’re likely not delusional. You’re probably exhausted. And scared. And stuck. But you’re not alone. And you’re not beyond help. There’s a name for what you’re going through. And more importantly, there’s a way forward.
Depressive Rumination vs OCD Obsessions
Ruminations in depression are about the past — “I’m a failure.” OCD obsessions are often “What if?” fears tied to future consequences or morality — “What if I hurt someone?”
If mood and obsession levels don’t rise and fall together, it might be more than just depression.
Tics/Tourette’s vs OCD: When Movements Look Like Rituals
Complex tics can resemble compulsions. But tics are often premonitory — a physical urge builds before release. OCD rituals are tied to fear reduction or intrusive thoughts.
50% of kids with OCD have tics, so careful assessment is key.
Eating Disorders vs OCD: Behaviour Looks Similar, But Isn’t
Both can involve rituals around food, but the core fear is different. In anorexia, it’s about body image and weight. In OCD, it might be about contamination, moral purity, or harm.
Digging into the why behind behaviours helps us draw the line.
Orthorexia: Healthy Eating Obsession or OCD?
Orthorexia (not yet a formal diagnosis) involves obsessive clean eating. Often ego-syntonic — people feel righteous or proud.
With OCD, it’s ego-dystonic — distressing and unwanted. That difference changes everything about how we treat it.
So, What’s the Big Takeaway?
Let’s step back for a moment.
Because at the heart of all this clinical language and diagnostic nuance is something deeply human: suffering, confusion, and the desperate hope that someone, somewhere, can explain what’s going on in your head. That’s what makes differential diagnosis so much more than a checklist — it’s a lifeline.
Getting it wrong doesn’t just mean a delay in treatment. It can mean years of silent suffering, feeling misunderstood, or worse, feeling like a lost cause. I’ve met too many people who’ve spent a decade under the wrong label — medicated for the wrong condition, going through therapy that didn’t work, feeling like it must be their fault. It’s not. They just hadn’t been appropriately seen yet.
I remember a client who said to me once, tears welling up in his eyes, “Why didn’t anyone tell me it could be OCD? This explains everything.” And just like that, the shame lifted. The puzzle pieces clicked. He wasn’t broken. He was misunderstood.
As a CBT therapist in Edinburgh, specialising in OCD, I’ve witnessed what happens when the diagnosis is finally right. ERP therapy becomes a game-changer. People who were barely getting by start to reclaim their days. They travel again. They laugh without second-guessing themselves. They stop being scared of their own minds.
So if you’re sitting there wondering — Is this really OCD? Or is it something else? Why does no one seem to get it? — Please don’t keep guessing. Don’t let doubt write your story.
Why not talk to someone who knows what to look for?
FAQs
How can I tell if it’s OCD or just anxiety?
OCD involves irrational fears and compulsions. Anxiety tends to focus on real-life issues, just taken to an extreme.
What if I’m scared of my thoughts? Does that mean I’m dangerous?
No — distress over the thought often means it’s OCD, not intent.
Can someone have OCD and another condition at the same time?
Yes — comorbidity with ADHD, depression, bipolar, and more is common.
Is ERP therapy effective?
Absolutely. ERP is the gold standard for OCD. It teaches you how to face fears without rituals.
Should I tell my GP if I think I have OCD?
Yes — and ideally, ask for a referral to a specialist trained in ERP therapy.
Yip, J. (2025). Perinatal OCD: The Secretive, Neglected Condition. 30th Annual OCD Conference, Chicago.
Oulis, P., et al. (2013). Insight and Psychopathology in Psychiatric Disorders. Psychiatry Research, 210(3), 1001–1005.