Obsessive-compulsive disorder (OCD)

Why OCD is so persistent

An intrusive thought is frightening. To reduce the anxiety, a person performs a ritual — checks, washes, repeats a phrase, seeks reassurance from those close to them. The anxiety does subside, but not for long, and the brain learns: “anxiety is dangerous, the ritual saves me.” Next time the thought comes back stronger, and the ritual has to be carried out for longer.

It is important to understand: the content of intrusive thoughts has no bearing on what you actually want. Thoughts about causing harm, about the forbidden, about contamination occur in most people — in OCD what changes is not the content but the reaction to it.

What works

The main method is exposure and response prevention. Together we gradually approach what causes the anxiety, and do not perform the ritual, letting the anxiety come down on its own. This breaks the “ritual — relief” link and the brain relearns.

The work is set up like this:

• We draw a map. Which thoughts trigger the anxiety, which rituals you perform, including mental ones, and which forms of avoidance you use.
• We build a ladder. From situations with moderate anxiety to the hardest ones. You determine the order and the pace.
• We work through the steps. Each step is repeated until the anxiety in that situation becomes bearable without the ritual.
• We work separately on mental rituals. They are invisible from outside, and often they are the last to go. This is the most technical part of the work.
• We involve those close to you. If relatives provide reassurance that “everything is fine”, they are, without meaning to, maintaining the disorder. We discuss how to change their part in it.

Tools from acceptance and commitment therapy are also used: they help you relate to intrusive thoughts as events in the mind rather than as messages demanding action.

How long it takes

Usually 12–25 sessions. Exposure work requires regular practice between sessions — that is what produces the result, not the discussion in the session.

What does not help

Trying to out-argue an intrusive thought or to prove to yourself once and for all that there is no danger. Any search for a guarantee is itself a ritual, and it maintains the problem. Therapy teaches something else: living with uncertainty without checking.

When a doctor is needed

In severe OCD a combination of psychotherapy and medication is recommended — that is for a psychiatrist to decide. The combination is more effective than either method on its own.