--- title: "Obsessive compulsive disorder (OCD): Symptoms & Treatment" description: "OCD explained — obsessions, compulsions, how it differs from perfectionism, and NHS treatments including CBT and SSRIs." url: https://healthanswers.co.uk/conditions/obsessive-compulsive-disorder/ robots: noindex --- # Obsessive compulsive disorder (OCD): Symptoms & Treatment Health A–Z OCD explained — obsessions, compulsions, how it differs from perfectionism, and NHS treatments including CBT and SSRIs. Written by HealthAnswers editorial team Medically reviewed by [Dr Neil Singh MBChB - nMRCGP](https://healthanswers.co.uk/our-doctors/neil-singh/) · GMC 7039648 Reviewed 28 June 2026 ## Quick answer What is obsessive compulsive disorder? OCD is a mental health condition where unwanted intrusive thoughts (obsessions) cause distress, leading to repetitive behaviours or mental rituals (compulsions) to reduce anxiety. Common themes include contamination, harm, symmetry, and checking. CBT with exposure and response prevention (ERP) is the most effective therapy; SSRIs help many people. OCD is not a personality quirk — see a GP if rituals take over an hour daily or severely disrupt life. ## Who is this page for? This page is for people in the UK who want a plain-English overview of Obsessive compulsive disorder (OCD), including when to seek help and what NHS care usually involves. It explains general information, not what is wrong with you personally. ## Who should skip this page? Skip this page if you need a diagnosis, a prescription, or emergency care. It cannot replace a GP, pharmacist, NHS 111 or 999. If you are in immediate danger, call 999; for urgent advice that is not life-threatening, call 111 in England, Scotland or Wales, or use your GP out-of-hours service in Northern Ireland. On this page 9 sections ## Key facts about obsessive compulsive disorder - OCD affects about 1 in 50 people — often starts in teens or early adulthood. - Obsessions are ego-dystonic — thoughts the person finds disturbing and does not want. - Compulsions provide temporary relief but reinforce the cycle — avoidance maintains OCD. - ERP therapy deliberately triggers anxiety without performing compulsion — gold standard CBT. - OCD is unrelated to cleanliness preference or being "organised" — severity and distress define diagnosis. ## OCD — intrusive thoughts and compulsive rituals **Obsessive compulsive disorder (OCD)** is an **anxiety-related condition** characterised by: - Obsessions — intrusive, unwanted thoughts, images, or urges - Compulsions — repetitive behaviours or mental acts performed to neutralise anxiety Affects roughly **1–2%** of people — often begins **before age 25**. It is **highly treatable** with **specialist CBT** — yet average delay to treatment is **years** due to shame. ## Obsessions — common themes **Contamination:** - fear of germs, illness, bodily fluids - mental contamination — “bad” feelings from people/places **Harm:** - intrusive thoughts of stabbing, pushing someone — Pure O variant without visible compulsions - checking locks, stoves, driving route **Symmetry/exactness:** - need for order — “not right” feelings **Religious/moral (scrupulosity):** - blasphemous thoughts, excessive guilt **Relationship OCD:** - doubts about partner love — constant reassurance seeking **Key:** thoughts are **ego-dystonic** — **opposite of desires** — person **horrified**, not pleased. ## Compulsions **Overt:** - hand washing until raw - checking appliances, doors — hours daily - ordering , counting , touching **Covert (mental rituals):** - praying , repeating phrases - memory reviewing - confession to partner repeatedly **Relief is temporary** — **anxiety returns** — cycle intensifies. ## OCD vs everyday habits | | OCD | Preference | | --- | --- | --- | | Distress | Severe if prevented | Mild annoyance | | Time | Hours | Minutes | | Insight | Knows excessive, cannot stop | Chooses behaviour | | Function | Impaired work/relationships | Organised life | **Not “being tidy”** — **disability-level** ritual in severe cases. ## Related conditions - Body dysmorphic disorder (BDD) — obsession with perceived appearance flaw - Hoarding disorder — difficulty discarding - Tic disorders — overlap Tourette + OCD ## Diagnosis **GP → IAPT (high-intensity) or specialist CAMHS/adult mental health** **Y-BOCS score** — severity measure **Exclude:** - autism — preference for sameness without typical OCD anxiety cycle - psychosis — beliefs held as true, not resisted - OCPD — personality style without intrusive obsessions ## Treatment ### ERP — exposure and response prevention **Gold standard CBT:** - expose to feared trigger (touch door handle) - prevent compulsion (no washing) - anxiety rises then falls — habituation - homework between sessions **Requires therapist trained in ERP** — generic counselling less effective. ### Medication **SSRIs** — **higher doses** than depression: - fluoxetine , sertraline , fluvoxamine - 12-week trial before switch **Clomipramine** — tricyclic — effective — side effect burden **Combine with ERP** for moderate-severe. ### What does not work - reassurance from family — feeds OCD - avoidance — maintains fear - ** alcohol** — worsens anxiety long term ## Supporting someone with OCD - do not participate in rituals (within therapeutic plan) - encourage ERP , not reassurance - patience — recovery non-linear **OCD Action** — UK charity. ## Prognosis **Many achieve significant improvement** with ERP — **complete cure** uncommon but **functional recovery** common. **Relapse** with stress — **booster ERP** helps. ## ! When to see a GP about obsessive compulsive disorder See a GP if intrusive thoughts and repetitive behaviours consume significant time (roughly over an hour daily), cause major distress, or interfere with work, relationships, or daily tasks. Referral to IAPT/CBT with ERP expertise or specialist mental health. Seek urgent help if obsessions involve suicide or inability to care for yourself or dependents due to rituals. ## Common questions about obsessive compulsive disorder What are obsessions and compulsions in OCD? Obsessions — persistent unwanted thoughts, images, or urges (e.g. contamination, harm to others, blasphemy, symmetry doubts). Compulsions — repetitive actions (hand washing, checking locks, counting, confessing) or mental rituals (praying, neutralising thoughts) performed to reduce anxiety from obsessions. Is OCD the same as being neat or perfectionist? No — personality preference for order is not OCD. OCD involves intrusive thoughts causing significant anxiety and time-consuming rituals the person often recognises as excessive but cannot stop without distress. Functional impairment distinguishes disorder. Can OCD cause violent thoughts? Intrusive thoughts about harming others are common in OCD — ego-dystonic — the person is horrified by thoughts and avoids harm, performing rituals to prevent imagined danger. Different from psychosis or risk — assessment distinguishes Pure O/harm OCD from genuine risk (rare). How is OCD treated on the NHS? High-intensity CBT with exposure and response prevention (ERP) — gradually facing feared situations without compulsion. SSRIs (fluoxetine, sertraline, fluvoxamine) at higher doses than depression — 12-week trial. Clomipramine second-line. Combined therapy and medication often best for moderate-severe OCD. Does OCD go away on its own? Sometimes mild cases fluctuate — chronic OCD rarely resolves without treatment and often worsens under stress. Early ERP improves long-term prognosis. Relapse prevention continues ERP principles after formal therapy. ## Sources - [NHS — Obsessive compulsive disorder](https://www.nhs.uk/mental-health/conditions/obsessive-compulsive-disorder-ocd/overview/) - [NICE — OCD and BDD](https://www.nice.org.uk/guidance/cg31)