Obsessive Compulsive Disorder (OCD)

Written by

Published May 07, 2021

Clinically reviewed by

Reviewed Jun 01, 2021

Overview

  • Obsessive Compulsive Disorder (OCD) is a mental health condition characterized by persistent, recurring thoughts or images (obsessions) that cause distress, driving someone to carry out behaviors or rituals (compulsions) to neutralize them. The obsessions and compulsions interfere significantly with daily life.
  • OCD affects an estimated 1.2% of U.S. adults each year — more common in females (1.8%) than males (0.5%). It can develop at any age but is most often diagnosed between ages 8–12 or in the late teens and early adulthood.
  • Obsessions are relentless — trying to stop them often makes them stronger. Compulsions provide only temporary relief before the cycle repeats. In some cases people recognize their obsessions are irrational; in others, they don’t.
  • There are four main types: cleaning/contamination, order/symmetry, harm, and hoarding OCD. Many additional subtypes exist.
  • Causes include family history, co-occurring mental health conditions, trauma, abuse, and brain structure differences.
  • OCD is treatable. CBT (especially ERP) and medication are both effective and are often most powerful in combination. Use our OCD screening test as a first step.

Symptoms of Obsessive Compulsive Disorder

OCD typically presents with both obsessions and compulsions, though in some cases only one type is present. 

Obsessions

Unwanted intrusive thoughts, images, or urges causing significant discomfort. Common themes:

  • Harm: Intrusive fears about hurting yourself or others
  • Contamination: Fears about germs, sickness, or touching surfaces
  • Unacceptable thoughts: Taboo sexual, religious, or aggressive intrusive thoughts that don’t align with one’s values
  • Symmetry: Intense need to keep things ordered or symmetrical

Compulsions

Behaviors or rituals carried out to reduce obsession-driven anxiety. Can be physical or mental. Provide only temporary relief — the cycle repeats. Common types:

  • Checking: e.g., checking the oven multiple times
  • Cleaning: e.g., excessive hand washing
  • Counting/repeating: e.g., repeating a behavior a specific number of times
  • Ordering: e.g., rearranging objects to achieve exact symmetry
  • Seeking reassurance: e.g., asking others to confirm a feared action won’t happen
  • Avoidance: Avoiding places, people, or situations that trigger obsessions

Causes of OCD

There is no single cause of OCD; several risk factors can contribute to the likelihood of someone developing OCD. 

  • Family history: Genetics plays a role; 20–40% of first-degree relatives in OCD cases have obsessional traits.
  • Co-occurring conditions: Having depression or anxiety may contribute to developing OCD.
  • Trauma: Trauma or high-stress situations may trigger OCD.
  • History of abuse: Physical or sexual abuse, particularly during childhood, increases risk.
  • Brain differences: Imaging studies show abnormalities in the orbitofrontal cortex (OFC), anterior cingulate cortex (ACC), and caudate nucleus in people with OCD.

Types of OCD

  • Cleaning/Contamination OCD: Focused on fears of contamination; excessive washing or cleaning to relieve distress. Learn more.
  • Order/Symmetry and Counting OCD: Intense urge to arrange things until they feel exactly right. Learn more.
  • Harm OCD: Extreme worry about harming yourself or others; often managed through checking rituals. Learn more.
  • Hoarding OCD: Now recognized as its own DSM-5 diagnosis; involves compulsive accumulation of items until living space becomes unusable. Learn more.

Additional types include relationship OCD, retroactive jealousy OCD, Pure O OCD, scrupulosity OCD, existential OCD, and false memory OCD.

Treatment for OCD

Therapy and medication are often most effective in combination. Treatment type and duration depends on symptom severity and quality-of-life impact. 

1. Therapy

  • CBT: Cognitive behavioral therapy helps people identify unhelpful thought patterns and how they drive behavior, then develop healthier responses. Includes relaxation techniques; work outside of sessions is needed for best results.
  • ERP (Exposure and Response Prevention): An offshoot of CBT developed specifically for OCD. The patient is exposed to their trigger, then prevented from carrying out the compulsion. Over time this desensitizes the fear response. Example: touching a doorknob without washing hands afterward.

2. Medication

Patients with more severe symptoms often require medication alongside therapy. OCD patients typically require higher doses and may need 10–12 weeks for full effect.

  • SSRIs: Most commonly prescribed. Include Lexapro, Prozac, Paxil, Luvox, and Zoloft.
  • SNRIs: Venlafaxine (Effexor) has clinical evidence supporting OCD treatment.
  • TCAs: Clomipramine (Anafranil) was the first OCD medication proven effective. Higher side-effect risk than SSRIs/SNRIs; not typically first-line.
  • Antipsychotics: Added when an antidepressant alone is insufficient. Risperidone (Risperdal) is most studied for OCD augmentation.

3. Alternative & Natural Treatments

Lifestyle changes and mindfulness training can support symptom management alongside therapy and medication. 

Types of OCD

Obsessive-compulsive disorder (OCD) is a mental health condition that affects people in multiple ways. There are several types of OCD that all overlap in symptoms but vary in how each person is affected. There are four main types of OCD commonly seen, but there are more than those on this list that may be less common. Additional types of OCD beyond this list include conditions like relationship OCD and retroactive jealousy OCD.

Existential OCD involves thoughts about human existence and the meaning of life. These uncontrollable thoughts can cause one to question the meaning of life and fear death. It can also cause a fear of impending doom and wondering about what’s “real vs. unreal.”

Existential OCD

Hoarding OCD is now actually recognized as its own diagnosis in the DSM-5. When someone hoards, they collect items that typically don’t have much value. Magazines, notes, clothing, games, containers — a hoarder may keep so many of these items, their home becomes virtually unlivable as it’s so filled with clutter.

Hoarding OCD

Relationship OCD (also known as ROCD) is a lesser-known subtype of obsessive-compulsive disorder — the mental health condition that causes people to have repeated behaviors or routines they can’t control (known as compulsions) related to the unwelcomed repeated thoughts (known as obsessions) they experience.

Relationship OCD

Scrupulosity OCD is a type of obsessive-compulsive disorder (OCD) that’s rarely discussed. Like all types of OCD, it involves unwanted thoughts and repetitive behaviors. The difference, however, is that the symptoms of scrupulosity OCD involve moral and religious beliefs.

Scrupulosity OCD

People who have a cleaning or contamination OCD tend to focus on fear or intense feelings of discomfort that results from contamination or uncleanliness. Washing excessively is normal and is done in an attempt to relieve the feelings of distress.

Contamination OCD

Retroactive jealousy OCD is a type of obsessive-compulsive disorder that involves becoming overwhelmed by intrusive thoughts of a partner’s past experiences with both romantic and sexual partners.

Retroactive Jealousy OCD

False memory OCD is a subset of obsessive-compulsive disorder that can cause people to doubt memories of a past event(s). It can also make them wonder if they did something but can’t remember.

False Memory OCD

Harm OCD involves extreme feelings or worry that you’ll harm yourself or others. In order to relieve these unwanted thoughts, you might use what’s known as checking rituals.

Harm OCD

Order and symmetry and counting compulsions OCD creates a very intense urge to arrange and rearrange things until they’re just right — or at least exactly how you think they should be. In some cases, this compulsive behavior could look like a need to constantly rearrange the socks in your drawer to be organized by color or by type.

Order/symmetry or counting compulsions OCD

Also known as purely obsessional OCD, pure OCD is an unofficial subtype of obsessional-compulsive disorder. It’s a form of OCD in which a person experiences obsessions but doesn’t have external compulsive behaviors.

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What are the common signs of OCD?

The most recognizable signs are persistent, unwanted intrusive thoughts (obsessions) about specific themes — harm, contamination, symmetry, or taboo topics — accompanied by repetitive behaviors or rituals (compulsions) performed to reduce the distress those thoughts cause. Key distinguishing features: the obsessions are relentless and can’t simply be dismissed; the compulsions provide only temporary relief before the cycle repeats; and the pattern takes up significant time and interferes with daily functioning. Use our OCD screening test as a first step.

How do you get diagnosed with OCD?

A licensed mental health professional makes the diagnosis by assessing the presence, themes, and impact of obsessions and compulsions. They will evaluate how much time symptoms take up, the degree of distress caused, and how significantly daily functioning is impaired. OCD can develop at any age but is most commonly diagnosed between ages 8–12 or in the late teens and early adult years. Our OCD screening test can be a useful first step.

Who can diagnose OCD?

Psychologists, psychiatrists, and licensed clinical therapists are all qualified to diagnose OCD. A primary care physician can conduct initial screening and refer to a mental health specialist. Because OCD can share features with anxiety, depression, and related disorders, an experienced clinician familiar with OCD is important for accurate diagnosis.

Can an online therapist diagnose OCD?

Yes. Licensed therapists and psychiatrists practicing via telehealth can evaluate and diagnose OCD. Online therapy is also an effective treatment option — both CBT and ERP, the two most evidence-based approaches for OCD, are available in online formats.

What type of therapy is best for OCD?

ERP (Exposure and Response Prevention) is the most evidence-based therapy developed specifically for OCD. It involves exposing the person to their obsession trigger and then preventing the compulsive response, gradually desensitizing the fear. CBT is also highly effective and provides the framework for ERP. The two are typically used together. For best results, work done in sessions must be complemented by practice outside of therapy.

When should you seek professional help for OCD?

Seek help if intrusive thoughts and repetitive behaviors are taking up significant time each day, causing distress, or interfering with work, relationships, or daily functioning. Many people live with OCD for years before seeking treatment. The sooner you get a diagnosis, the sooner treatment can begin — and outcomes are significantly better with early intervention. Don’t wait until symptoms become severe.

Can OCD be treated?

Yes. OCD is treatable. CBT (especially ERP) and medication are both proven effective, and are often most powerful in combination. Treatment type and duration depends on symptom severity. Medications typically take 10–12 weeks for full effect, and higher doses are often needed for OCD than for other conditions. With consistent treatment, the obsession–compulsion cycle can be significantly disrupted and quality of life improved.

What are disorders related to OCD?

The DSM-5 recognizes several OCD-related disorders — each involves obsessions and compulsions causing distress, but each has unique distinguishing features:

Note: OCPD (obsessive compulsive personality disorder) is distinct from OCD. People with OCPD are extreme perfectionists who typically don’t question or feel ashamed of their behavior. It is a personality disorder, not an OCD-related condition. See: OCPD vs. OCD: What’s the Difference?. Many people with OCD also experience major depressive disorder (MDD); both conditions are commonly treated with SSRI medications.

  • Excoriation (skin picking) disorder: Compulsive urges to pick at skin, sometimes for hours; often starts with a dermatological condition. May cause scarring or tissue damage.
  • Trichotillomania (hair-pulling disorder): Compulsive pulling of hair from the head, eyebrows, eyelashes, or elsewhere. Two types: focused (person is aware) and automatic (done subconsciously). Usually starts in childhood or adolescence.
  • Body dysmorphic disorder (BDD): Obsessing over perceived physical flaws (often not visible to others), accompanied by repetitive behaviors like mirror-checking or excessive grooming. Often co-occurs with major depressive disorder or social anxiety.
  • Hoarding disorder: Compulsive accumulation of items and extreme difficulty parting with them; results in severely cluttered living situations. Chronic, usually starting in adolescence.
  • OCD from medication or medical condition: Some antipsychotics may induce OCD-like symptoms. Medical conditions can also cause OCD — one example is PANDAS.

How prevalent is OCD?

An estimated 1.2% of U.S. adults (age 18+) had OCD in the past year — 1.8% of females and 0.5% of males. Of those with OCD: 50.6% reported serious impairment, 34.8% moderate impairment, and 14.6% mild impairment.

What are the best types of therapy for OCD?

The two most evidence-based therapies are CBT (identifies unhelpful thought patterns and how they drive behavior, then builds healthier responses; includes relaxation techniques and work outside of sessions) and ERP (an offshoot of CBT developed specifically for OCD; exposes the patient to their trigger, then prevents the compulsion — over time desensitizing the fear response). The two are typically used together.

What types of medication are used for OCD?

The four medication categories used to treat OCD (note: patients typically require higher doses and 10–12 weeks for full effect):

  • SSRIs: Most commonly prescribed. Include Lexapro, Prozac, Paxil, Luvox, and Zoloft.
  • SNRIs: Venlafaxine (Effexor) has clinical evidence for OCD.
  • TCAs: Clomipramine (Anafranil) — first medication proven effective for OCD; higher side-effect risk than SSRIs/SNRIs, not typically first-line.
  • Antipsychotics: Used to augment when antidepressants alone are insufficient. Risperidone (Risperdal) most studied for OCD.
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