Obsessions, compulsions and the urge to get certainty

What is an obsession?

Obsessions are recurring, unwanted thoughts, images or urges that intrude and cause distress. Themes can involve harm, contamination, responsibility, relationships or a sense that something is not right. The experience can include doubt, disgust or incompleteness as well as fear.

An intrusive thought is not, by itself, evidence of a person's wishes or intentions. Clinicians assess the context rather than judging someone by a thought's topic. Actual intent, behavior and safety concerns still need appropriate assessment.

Source context: International OCD Foundation: understanding obsessions and compulsions · NIMH: OCD signs, symptoms and treatment

What is a compulsion?

Compulsions are repeated actions or mental acts a person feels driven to perform, often to reduce distress, prevent a feared outcome or reach a ‘just right’ feeling. Examples include repeated washing or checking, silently counting, reviewing memories and repeatedly asking for reassurance.

The purpose and impact matter. An ordinary check, a valued religious practice or a preferred routine is not automatically a compulsion. OCD symptoms are time-consuming, cause significant distress or interfere with daily life.

Source context: International OCD Foundation: understanding obsessions and compulsions · NIMH: OCD signs, symptoms and treatment

Why the loop can keep returning

A common pattern is: an intrusive doubt brings distress; a ritual offers temporary relief; doubt returns and the urge to repeat the ritual grows. That short-term relief can reinforce reliance on the compulsion. It is a learning pattern, not a moral failure or a complete explanation of what causes OCD.

Imagine someone repeatedly rereading an ordinary message to feel certain it could not upset anyone. Each review settles the worry briefly, but then a new ‘what if’ appears. The treatment question concerns the repeated search for certainty, not finding an infallible message.

Source context: International OCD Foundation: exposure and response prevention · International OCD Foundation: digital reassurance seeking

The ritual may be happening inside

Mental compulsions can include reviewing an event, arguing with a thought, checking feelings or silently replacing a disturbing thought. A person can look still while working very hard to reach certainty. Trying to solve an unanswerable doubt again and again can keep them occupied even without visible rituals.

Online searching can serve the same function. Repeatedly asking a search engine, forum or AI for a definitive answer may become reassurance seeking. Looking up information is not automatically a compulsion; its function, repetition and impact are what matter.

Source context: International OCD Foundation: mental rituals and disengaging from rumination · International OCD Foundation: digital reassurance seeking

Responding to an urge without fighting every thought

In treatment, ‘counteracting’ an urge generally means practicing a different response to it, not forcing the thought out or proving its opposite. ERP helps someone approach an agreed trigger while practicing without the compulsion. The clinician and person decide what that looks like and how to support it.

A general way to understand this learning is: notice the pull toward a ritual, recognize the agreed practice, and return attention to a chosen activity while allowing uncertainty to be present. This is an explanation, not a timed exercise or a substitute for an individualized plan.

Source context: Society of Clinical Psychology: ERP for OCD · International OCD Foundation: inhibitory learning in ERP

Watch for a replacement ritual

Positive statements, breathing, distraction or a coping phrase can become another ritual if they must be repeated until the person feels safe or gets the ‘right’ feeling. Their purpose matters. A coping tool is not a requirement to erase discomfort before life can continue.

Discuss these patterns without blame. Difficult days and recurring urges are information to bring to treatment, not a test of character. Support should make it easier to seek help, not add another standard the person must meet perfectly.

Source context: IOCDF-hosted clinician resource: common OCD treatment myths (PDF) · International OCD Foundation: mental rituals and disengaging from rumination

When to ask for help

If thoughts, rituals or avoidance disrupt sleep, school, relationships or everyday tasks, ask a qualified clinician about an OCD assessment. You do not need to wait until symptoms fill the entire day. Bring a few examples of the pattern and its impact rather than an exhaustive diary.

For autistic people, the assessment should consider sensory needs, routines and communication as well as possible OCD. Tics can also coexist with OCD. Similar-looking repetitions can have different functions, so a supporter should not decide the diagnosis from appearance alone.

• Understand ERP and questions to ask →
• Find supportive words for a difficult moment →

Source context: NIMH: OCD signs, symptoms and treatment · International OCD Foundation: treating OCD in autistic people