What is Checking OCD?

Checking OCD is a subtype of obsessive-compulsive disorder where intrusive doubt triggers compulsive checking to prevent harm or relieve anxiety. It follows the same OCD cycle that all subtypes follow. You can read more about the OCD cycle in my main Guide to OCD

• Obsession: Did I turn off curling tongs?
• Anxiety/doubt: Not knowing for sure if you did or not, creates crippling anxiety and doubt and you spiral into worse case scenarios, such as your house could burn down and it will be your fault.
• Compulsion: Go back home and check
• Temporary Relief: You feel better for a short time

This cycle is very strong as you have just unwittingly reinforced your compulsion to check. Even after rationally knowing things are probably okay, the doubt (“Are you absolutely sure?”) persists and won’t let go. When working with people with checking OCD, this is the question most clients want answered – how do you know for sure? And I always explain that even though the answer to that feels extraordinarily important ( almost like life or death) , it is not. The doubt is part of OCD and seeking reassurance is a symptoms that keeps it going, although from a person perspective, I do empathise as this is the type of OCD that I personally experienced.

It’s important to understand that checking OCD is not “being extra careful” or “just double-checking.” It is an intense anxiety-driven cycle that consumes significant time and mental energy. I certainly knew thatrepeated checking was irrational or excessive, yet I found it immensely difficult to stop. If this happens to you, it is because your mind overestimates the probability of catastrophe and your personal responsibility for preventing it. Personal responsibility is a huge part of OCD, that most people are not aware of. At its basic level, all form of OCD, including checking can be distilled down to;

You check to prevent something bad from happening, that would be your fault.

For instance, leaving a cooker on could possibly cause a fire, but in OCD the level of worry is blown far out of proportion – you feel as if you must be 100% certain the cooker is off, or else you’ll be to blame for a terrible outcome. This extreme intolerance of uncertainty and inflated sense of responsibility are hallmarks of checking OCD

Common Obsessions and Compulsions in Checking OCD

Some common obsessions in checking OCD include:

• Fear of appliances or lights being left on: e.g. thoughts that an unplugged iron, cooker, heater, or light switch was mistakenly left on, potentially causing fire or electrical accidents.
• Fear of doors or windows left unsecured: persistent worry that “Maybe I didn’t lock up properly” leading to intruders or theft.
• Fear of not completing a task correctly: e.g. “What if I made a mistake in that email or work report and it ruins everything?” Obsessing that you sent a message to the wrong person, made a critical error in a form, or forgot an important step that will cause harm or serious consequences.
• Fear of causing accidental harm while distracted: for example, hitting a pedestrian or animal with your car without realizing, or leaving something in a way that someone could trip or get hurt.

To neutralize these obsessions, compulsions in checking OCD typically involve repetitive verifying behaviors and other safety measures:

• Re-checking actions repeatedly: Going back to check locks, stove knobs, plugs, the fridge door, seatbelt, handbrake, etc. multiple times before feeling able to move on. This can include retracing your driving route to “make sure” no accident occurred, or reopening and re-reading an email draft 20 times before sending.
• Mental checking and reviewing: Playing events over in your head to search for any sign of a mistake (for instance, mentally scanning the entire commute for bumps that might indicate an accident). Recounting or re-imagining your steps to convince yourself everything was done right.
• Seeking reassurance: Asking family members or friends for confirmation that everything is okay (“You saw me turn the oven off, didn’t you?”), or even calling someone to go check on something for you while you’re away. This also includes endlessly Googling to get certainty (e.g. looking up news to ensure no accident happened in the area, or checking email “sent” folders repeatedly).
• Avoidance of responsibility triggers: In some cases, people may avoid situations that spike their checking fears. For example, they might avoid driving on certain routes to not risk the “hit someone” obsession, or avoid using appliances altogether (like not using the gas cooker and only eating cold food) to feel safer.

Impact of Checking OCD on Daily Life

This is not just being safety conscious or double checking, many clients that I worked with ended up coming to see me in therapy as they were exhausted by it, possibly taking hours to leave the house each day because they are stuck in a loop of verifying locks, appliances, and so on. Being late for work or appointments as leaving the house took too long, getting into trouble for their lateness; this is a secondary difficulty of having checking OCD that is invisible to others.

Checking OCD vs. Normal Caution or Other Conditions

How do you tell checking OCD apart from normal careful behaviour? After all, everyone double-checks things occasionally. The key differences lie in degree, distress, and function. A person without OCD might double-check the front door if it’s a rough area or double-check an important email for typos – but then they move on. In OCD, the checking is repetitive and driven by severe anxiety, far beyond what the situation rationally warrants. Importantly, the behaviour in OCD is compulsive: the person feels they must do it to relieve overwhelming dread, even though they often recognize the fear isn’t entirely logical. Normal caution doesn’t consume your mind with panic; OCD does.

Another distinction is that in OCD, the checking is often aimed at relieving an internal sense of doubt or dread rather than responding to a realistic external warning. For example, if you smell gas in your house, it’s normal to check the stove. But if you’ve checked the stove 10 times and logically know it’s off, yet still feel like something is “not sure” – that is OCD playing its tricks. People with checking OCD often describe a feeling that no amount of checking is ever enough to be 100% certain, because the OCD always finds a new angle of doubt (“Maybe you didn’t actually jiggle the handle hard enough; maybe you missed something”) when in reality, a non-OCD person would have long since been satisfied everything was okay.

It’s also worth distinguishing checking OCD from Generalised Anxiety Disorder (GAD) or routine worry. While GAD involves a lot of worry about bad outcomes, it doesn’t typically produce the ritualistic behaviors seen in OCD. A GAD sufferer might worry a lot about house fires too, but they tend to cope by seeking information or general reassurance, not by literally going and checking the stove 20 times in a row. In OCD, the rituals are very specific and often bizarrely excessive, and they directly connect to an obsession (thought) in a cycle. Additionally, OCD thoughts often have a “magical” or irrational quality (like the fear that a single unlocked window will certainly lead to a catastrophe), whereas non-OCD anxiety is usually about more plausible everyday concerns.

Treatment for Checking OCD

Checking OCD, like all forms of OCD is treatable. The frontline treatment for all forms of OCD, including the checking subtype, is a type of cognitive-behavioural therapy called Exposure and Response Prevention (ERP).

• Learn about treatment for OCD
• Learn about different subtypes of OCD
• Browse all OCD articles

ERP is a highly effective, evidence-based approach that directly targets the OCD cycle. In ERP, you work gradually with a therapist to expose yourself to the source of your obsession (for example, intentionally leaving the house without checking the door a second time), and then prevent the response (i.e. resist the urge to go back and check). By doing so in a guided way, you learn that the anxiety does spike but eventually subsides on its own, and that the feared catastrophe doesn’t happen. Over repeated practice, your brain starts to retrain itself – it becomes less sensitive to the uncertainty, and the compulsive urge diminishes.

For checking OCD, ERP exercises might include things like: deliberately leaving a minor appliance plugged in and sitting with the discomfort without checking; or driving a short route and not allowing yourself to mentally review it afterwards, learning to tolerate the uncertainty. Therapists often tailor creative exposures to match your specific fears. For example, if you fear you left the door unlocked, an exposure might be purposefully leaving it unlocked for 10 minutes while you stay home and observe that nothing bad happens – then eventually working up to leaving it unlocked and taking a short walk outside, and so on (note: these are done with professional guidance in a safe manner – you wouldn’t start with something that genuinely puts you in danger; the idea is to simulate the uncertainty in a controlled way).

In addition to therapy, medication can be a helpful tool, especially if OCD symptoms are moderate to severe. The most commonly recommended medications for OCD are SSRIs (selective serotonin reuptake inhibitors) – a class of antidepressants that also reduce OCD anxiety. Medications like sertraline, fluoxetine, or escitalopram are often prescribed. These meds don’t “erase” OCD or make you forget to check, but they can lower the volume of the obsessive anxiety, making it easier for you to resist compulsions and engage with therapy. In Ireland, a GP or psychiatrist can prescribe SSRIs for OCD; many people find a combination of therapy (ERP) and medication works best. Always discuss with a healthcare professional to find the right plan – never feel you have to just “live with it.”