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What Is OCD? Understanding the Disorder
Mental Health First Aid

What Is OCD? Understanding the Disorder

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          Pratyusha Pal
          Pratyusha Pal

          June 19, 2026

          5 min read

          A Person compulsively washing hands as part of obsessive behaviour, a common symptom of OCD contamination.

          Introduction

          Obsessive-Compulsive Disorder (OCD) is a long-term mental health condition where individuals experience uncontrollable, recurring thoughts (obsessions) and repetitive behaviours (compulsions). Often misunderstood or misused in everyday language, OCD is far more than a preference for cleanliness or organisation. This article explores the true meaning of OCD, its symptoms, causes, and the most effective treatments available, including how to stop OCD from interfering with daily life.

          Definition and example of OCD obsession and compulsion, featuring a fear of accidentally harming someone while driving.

          What is the meaning of OCD?

          When someone experiences obsessions, they often feel an intense urge to carry out specific behaviours (compulsions) to reduce the discomfort. Even if they try to resist, the intrusive thoughts tend to return and interfere with whatever they're doing. Eventually, the person gives in to the compulsion, which brings short-term relief. But this relief is temporary; before long, the obsessions return, and the cycle starts all over again.

          Infographic illustrating the OCD cycle, showing how obsessions, compulsions, and anxiety are interlinked.

          OCD behaviour: symptoms of obsessions and compulsions

          It is essential to understand that OCD includes both obsessions and compulsions. However, sometimes a person may experience only obsessive symptoms. Learn more about the symptoms below.

          Symptoms of obsessions

          Obsessions are uncontrollable and unwanted thoughts, images, or impulses that appear repeatedly. These can be disturbing, frightening and leave you feeling anxious and uncomfortable. Obsessions often follow common themes.

          Types of obsessions

          Examples

          Fear of contamination

          Feeling that you might get infected by germs, someone else is spreading germs, or everything around you is contaminated

          Intrusive thoughts, images and impulses

          Violent images, persistent doubt about a relationship, or fear of harming someone

          Fear related to symmetry

          The need for everything to be perfectly aligned or something bad might happen

          Fear of failing to prevent harm

          Worrying that someone might hurt your loved ones or yourself due to your inattention

          Symptoms of compulsions

          Compulsions are behaviours or rituals you feel the urge to perform to deal with the anxiety caused by obsessions. These actions are time-consuming, and any relief is usually temporary. Common compulsions include:

          Compulsions

          Examples

          Checking

          Checking your body for contamination or repeatedly checking doors and windows to ensure safety

          Rituals

          Arranging items to maintain symmetry

          Connecting thoughts

          Counting to a specific number before starting tasks, or repeating words or phrases.

          Reassurance

          Frequently seeking confirmation from others that everything is fine

          Infographic showcasing the common types of OCD, including contamination OCD, symmetry OCD, and intrusive thoughts OCD

          What causes OCD?

          The causes of OCD have not been fully understood yet, but research suggests some factors contributing to the development of the condition:

          Biological factors

          • OCD can run in families, suggesting a genetic link

          • Abnormalities in different brain areas can contribute to the condition

          • An imbalance in neurotransmitters can cause OCD

          • Some other neurological conditions can increase the risk.

          Psychosocial factors

          • Obsessions and compulsions may develop as a way to cope with stress.

          • Being very self-critical or sensitive to judgment may make someone more likely to develop OCD.

          • Events like job loss or significant changes can trigger symptoms.

          • Difficult or traumatic experiences in early life may increase the risk.

          Interested in mental health training? Our Mental Health First Aid (MHFA) course provides essential knowledge and practical skills to promote well-being in everyday situations.

          How to manage OCD: Effective strategies

          Many people with OCD hesitate to seek help due to embarrassment or fear of being judged. But OCD is a recognised mental health condition and getting support is not only okay, it's essential.

          Therapy and medication

          One of the most effective ways to manage OCD is through Cognitive Behavioural Therapy (CBT) a type of therapy that helps individuals recognise and change negative patterns in thinking and behaviour. Within CBT, the most important technique used to treat OCD is called Exposure and Response Prevention (ERP). ERP works by gradually exposing individuals to the thoughts or situations that trigger their obsessions while helping them resist the urge to carry out compulsive behaviours. Medications, often in combination with ERP, can significantly reduce symptoms.

          Self-help

          • You can refer yourself directly to the NHS talking therapies.

          • You can contact NHS 111 directly and find mental health support.

          • You can contact your local GP in case of an emergency.

          Peer support

          You can find local support through organisations like:

          Frequently Asked Questions

          What is the complete form of OCD?

          The complete form of OCD is Obsessive-Compulsive Disorder.

          Is OCD a disability?

          It can be considered a disability when it significantly impairs the ability to perform daily activities.

          How can I treat OCD?

          Therapy, along with medication, is helpful. Consider taking professional help if needed.

          What are the types of OCD?

          Common themes in OCD include contamination, checking, symmetry/order, and intrusive thoughts.

          Can workplaces help people with OCD?

          Yes. With proper accommodations and MHFA-trained staff, employees with OCD can thrive.

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