“I’m so OCD.” “I think I’m a little OCD, I like things neat.” Clinicians hear versions of this constantly, said casually, sometimes as a joke, sometimes with a note of pride. The person is usually describing themselves as particular, exacting, or a little controlling. Almost none of it has anything to do with obsessive-compulsive disorder (OCD).

OCD is defined by intrusive, unwanted thoughts that generate real anxiety, disgust, or dread, and by repetitive behaviors or mental rituals performed to relieve that distress. These cycles can consume hours a day. Patients often know, with complete clarity, that their fears are irrational, and still cannot stop. That combination, insight paired with an inability to act on it, sits close to the center of the disorder. It is not a condition of quirkiness. It is often debilitating.

The gap between the popular version and the clinical one starts with a simple confusion: preference versus compulsion. Someone who likes the television volume on an even number, and switches it from 19 to 20 because 20 simply feels better, is expressing a preference. Someone who believes, despite knowing better, that leaving it on 19 could somehow bring harm to their child, feels a spike of anxiety they cannot reason away until they change it, and then immediately begins doubting whether they changed it correctly, is doing something else entirely. The two behaviors can look identical from the outside. Internally, they are not close.

Checking illustrates the same problem. Many people check that the stove is off or the door is locked, sometimes more than once, and that is ordinary, even prudent. In OCD, checking does not resolve anything. The person checks the lock, walks away, stops, turns back, checks again, and is still asking, halfway to the car, whether they only imagined checking it. And they could end up losing an hour or more daily to the ritual. Every check buys a few seconds of relief and teaches the brain to demand another one. The ritual gets stronger. The doubt does too.

Obsessions themselves can take disturbing forms that have nothing to do with order or symmetry: a fear of having harmed someone without realizing it, an intrusive thought of one being guilty of incest, infanticide, pedophilia, or something else horrific and at complete odds with who and what one is as a person. What defines these thoughts clinically is not their content but the person’s relationship to them. They are experienced as alien, unwanted, and impossible to simply dismiss, which is exactly why people with genuine OCD are far more likely to hide their symptoms than to announce them the way “I’m so OCD” gets said.

A separate but related confusion involves autism spectrum disorder and other neurodevelopmental conditions, where repetitive behavior, routines, and rigid preferences are common but often serve a different function entirely: providing regulation, predictability, or comfort rather than relieving an intrusive fear. The outward behavior can look similar. The internal experience, and the clinical approach, are not.

None of this is pedantry. When “OCD” becomes shorthand for neatness or control, three things go wrong. People misdiagnose themselves, attributing genuine stress, trauma, or personality traits to a disorder they do not have. Clinicians and patients alike can misdirect treatment, since a checking behavior rooted in anxiety or past experience does not respond to the same intervention as a true obsession-compulsion cycle. And the severity of the actual disorder gets minimized, so that someone quietly consumed by hours of mental rituals no one else can see gets measured against a cultural image of a color-coded bookshelf and, understandably, does not recognize themselves in it.

The solution is not to police how people talk at dinner. It is to keep the clinical meaning of the term intact enough that when someone is actually suffering from it, the label still points a clinician toward the right questions. Not everything repetitive is a compulsion. Not everything orderly is pathological. And precision here is not an academic nicety; it is the difference between recognizing a serious illness and mistaking it for a personality quirk.

Nebyou Belay is a practicing psychiatrist with twenty years of experience treating children, adolescents, and adults. He is affiliated with the Brown University Department of Psychiatry and practices at Rhode Island Hospital and Newport Hospital.

He writes about the practice of psychiatry itself: how diagnoses are made, how they’re communicated to patients and families, and how psychiatric language is understood (and often misunderstood) in the wider culture. His work touches on the science and the limits of psychiatric assessment, the boundaries of what medication and diagnosis can realistically offer, and the growing overlap between clinical language and everyday identity.

Across all of it, his aim is the same: to help patients, families, and the public engage with mental health more honestly, with less oversimplification and less noise. He is currently writing a book, The Myths and Misunderstandings of Psychiatry, and is a contributor to KevinMD. He shares updates on LinkedIn.