The exhausting cycle of the compulsion: why we repeat what we know is irrational

Health · Published 18 October 2026 Swipe more like this →

In short: It begins with an intrusive, unwanted thought. Then comes the anxiety. To find relief, you perform a repetitive act, only for the distress to return. This loop defines obsessive-compulsive disorder, a pattern where the brain seeks to neutralize fear through actions that often defy all logic.

Obsessive-compumive disorder (OCD) is driven by a three-part cycle: obsessions, emotions, and compulsions. Obsessions are intrusive, distressing thoughts, images, or urges—such as a fear of contamination or the sudden, repulsive thought of causing harm. These trigger intense anxiety. In response, the individual feels driven to perform compulsions—repetitive mental or physical acts like washing, checking, or counting—to temporarily relieve that distress. While these behaviors might provide a momentary reprieve, the anxiety inevitably returns, restarting the cycle.

Crucially, most people with OCD recognize that these compulsions are irrational and do not logically align with their goals. They may perform actions 'just in case' to prevent a perceived catastrophe, such as checking a stove repeatedly to ensure the house does not catch fire. Unlike habits, which are automatic routines, or addictions, which initially derive pleasure from a stimulus, OCD compulsions are specifically an attempt to reduce the apprehension caused by internal, distressing thoughts.

The impact of these behaviors can be profound, often co-occurring with other conditions like depression, eating disorders, or generalized anxiety disorder. In some neurological contexts, such as Parkinson's disease, impulsive-compulsive behaviors can form part of complex neuropsychiatric profiles, interacting with affective dysregulation. Research in animal models also suggests that dysregulated dopamine signaling in the nucleus accumbens may play a role in the vulnerability to compulsive drug-seeking behaviors, particularly when the brain's ability to update the value of rewards becomes impaired.

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