Contamination OCD

Contamination OCD is perhaps the type of OCD most people are familiar with. When we think of OCD, we often picture someone who washes their hands excessively, avoids germs or needs everything to be spotlessly clean. But contamination OCD is considerably more complicated and nuanced than simply wanting to wash your hands a lot.

For some people, it involves a fear of becoming ill or making someone else ill. For others, it’s less about the consequences of contamination and more about the unpleasant feeling of being dirty or contaminated. Sometimes it’s a combination of the two. And as we’ll explore, the attempts to prevent contamination can gradually become so extensive that they affect almost every aspect of someone’s life.

What is contamination OCD?

Contamination OCD involves recurring intrusive thoughts, doubts, feelings, or sensations related to dirt, germs, hygiene, or contamination. I think the word feelings is particularly important here. We often describe OCD in terms of intrusive thoughts, such as “What if I’ve touched something contaminated?” or “What if I pass on an infection to someone I love?” But sometimes there isn’t a particularly clear thought at all. Someone’s hands might simply feel dirty. They might experience an almost physical sensation of contamination, as though there’s a layer of something unpleasant coating their skin. Even when they can see that their hands are clean, the feeling might persist. This can be incredibly uncomfortable, and the urge to wash or clean can feel almost irresistible.

For some people, the concern is primarily about germs, bacteria or viruses. They might worry about catching an illness themselves or, perhaps more distressingly, passing something on to a vulnerable family member. For others, contamination is more closely tied to disgust or a sense that something is unpleasant, wrong, or unacceptable. These experiences can overlap, but they’re not quite the same thing. Someone might recognise that an object presents virtually no risk of making them ill and still feel an overwhelming need to clean it.

How contamination spreads

One particularly difficult aspect of contamination OCD is how contamination can seem to spread from one object or surface to another. Imagine touching a door handle that you believe is dirty. You then pick up your phone, sit on the sofa and touch a cushion. Suddenly, your phone, sofa and cushion might all feel contaminated too. Some people describe this almost as though there’s an invisible coating of germs that transfers between surfaces. Think of those cleaning adverts where germs are shown spreading around a kitchen under fluorescent lighting. Of course, there is some truth to the idea that germs can transfer between surfaces. Bacteria and viruses exist, and ordinary hygiene precautions are sensible. The difficulty with OCD is that the significance of this possibility can become enormously exaggerated. Someone might begin to feel that even the slightest possibility of contamination is unacceptable.

“What if there’s even a 1% chance? Surely, it’s better to be safe than sorry?”

And so increasingly elaborate precautions begin to develop. Perhaps outdoor clothes aren’t allowed on the bed. Phones must be cleaned before entering certain rooms. Shoes cannot touch particular surfaces. Objects that have been outside must be kept separate from things considered clean.

Over time, the world can become divided into things that are clean and things that are dirty. The problem is that these boundaries can become increasingly difficult to maintain. If something dirty touches something clean, does that mean the clean object is now contaminated too? And what about everything that object subsequently touches? Before long, contamination can seem to spread almost endlessly.

Washing, cleaning and other compulsions

Understandably, when someone feels frightened or deeply uncomfortable about contamination, they want to do something about it. The most recognisable responses are washing and cleaning. Someone might wash their hands repeatedly, shower excessively, change their clothes several times a day or use large quantities of disinfectant and hand sanitiser. But contamination OCD can involve many other behaviours too. People might avoid public toilets, door handles, public transport, or certain places. They might try to keep certain objects from touching one another or develop strict rules about where things can go.

Sometimes the compulsions become quite elaborate. For example, someone might wash their hands but then worry that they haven’t washed them thoroughly enough. Perhaps they touched the tap afterwards, or accidentally brushed against something they consider contaminated. Now they feel they need to start again. Washing might need to follow a particular order, be repeated a certain number of times, or continue until their hands feel sufficiently clean. And sometimes, no matter how much someone washes, that feeling of cleanliness never quite arrives. People may also seek reassurance from others.

“Are you sure that’s clean?” “Did you wash your hands after touching that?” “Do you think there’s any chance I could catch something from this?”

Reassurance might help temporarily, but the doubt or feeling of contamination can quickly return. Some people also start avoiding activities altogether because the cleaning required afterwards feels too exhausting. Going outside, visiting friends or even sitting in certain parts of the house can become something to dread.

For some, the outside world itself begins to feel contaminated. This might include worries about the air, other people, or simply being away from the safety of home. The Covid pandemic, with its emphasis on infection, hygiene and isolation, may have intensified these concerns for some people.

When cleaning becomes part of the problem

One of the particularly frustrating things about contamination OCD is that the very behaviours intended to make someone feel safer, or cleaner, can end up making the problem worse. Imagine someone whose hands feel contaminated after touching a door handle. They wash their hands, and the feeling begins to subside. Understandably, they conclude that washing was necessary. After all, they felt dirty, they washed, and now they feel better.

But there’s another possible explanation. The uncomfortable feeling might have subsided on its own if they’d left it alone. By repeatedly washing whenever that feeling appears, they never really get the opportunity to discover this. Instead, the feeling of contamination becomes increasingly important. It starts to function almost like an alarm that demands an immediate response.

“I can’t possibly get on with my work while my hands feel like this.”

“I won’t be able to sleep unless I know everything is clean.”

“If I don’t clean this now, everything else will become contaminated too.”

The more someone responds to these feelings by washing, checking, or avoiding, the harder it can become to tolerate them. And because absolute cleanliness or freedom from contamination is impossible to guarantee, there’s always another potential risk to consider. Perhaps the most difficult part is that these precautions can initially seem perfectly reasonable. After all, what’s wrong with being careful about hygiene?

But gradually, the rules become more demanding, more time-consuming and harder to follow. Something that began as an attempt to reduce anxiety or discomfort can end up taking over everyday life.

When contamination isn’t about physical dirt

There’s another experience worth mentioning, sometimes referred to as mental contamination. This involves feeling dirty, polluted or contaminated without necessarily having come into contact with anything physically unclean. For example, someone might feel intensely contaminated after an upsetting, humiliating, or traumatic experience. They may feel a need to wash, change their clothes or perform other rituals to try to remove that feeling. There is some evidence linking traumatic experiences with contamination-related symptoms, although this doesn’t mean that contamination OCD is necessarily caused by trauma or that cleaning rituals always have some deeper symbolic meaning. For many people, there may be no obvious event or explanation for why their contamination fears developed. What matters is understanding how the problem is operating for that individual.

How contamination OCD affects everyday life

Contamination OCD can significantly affect someone’s quality of life. Washing and cleaning can consume hours of the day. Repeated handwashing or using harsh cleaning products can leave skin dry, cracked, and painful. Ordinary activities such as cooking, shopping, travelling or visiting friends can become exhausting because of all the precautions involved. But the effects often extend beyond the person experiencing OCD. This is particularly noticeable when people live with partners, children or other family members. Someone might ask their partner to change clothes immediately after coming home, wash their hands a certain way, or avoid touching certain objects. Family members may find themselves following increasingly complicated rules to prevent contamination. Often, they go along with these requests because they can see how distressed their loved one becomes when the rules aren’t followed. This is completely understandable, but it can also mean that the OCD gradually begins to dictate how the whole household operates. Arguments, frustration and resentment can develop, even when everyone involved is trying their best. And the person experiencing OCD may feel increasingly guilty or embarrassed about the impact their difficulties are having on others.

Getting help with contamination OCD

Contamination OCD can be incredibly debilitating, particularly when everyday environments and activities begin to feel unsafe or intolerably dirty. It’s also important to recognise that treatment doesn’t aim to convince someone that germs don’t exist or that hygiene is unnecessary. We all need to take reasonable precautions to protect ourselves and others. The difficulty with OCD is that these precautions become increasingly excessive, rigid or driven by a need to eliminate uncertainty and uncomfortable feelings. Therapy helps people understand and change the patterns of thinking and behaviour that keep contamination OCD going. This involves developing a different relationship with feelings of contamination, uncertainty and discomfort, rather than continually trying to eliminate them through compulsions.