Types of OCD: Understanding the Different Forms of Obsessive-Compulsive Disorder

This site contains product affiliate links. We may receive a small commission if you make a purchase after clicking on one of these links.

Obsessive Compulsive Disorder (OCD) is a complex mental health condition that is estimated to affect over 100 million people worldwide. The Diagnostic and Statistical Manual of Mental Disorders 5 characterises OCD as the ‘presence of recurrent, intrusive thoughts (obsessions) and/or repetitive, rigid behaviors (compulsions).’

In the book, Stop Obsessing!, the authors note that, unlike the distressing thoughts that trigger anxiety symptoms, OCD stems from 'relatively stable worries: The same thoughts, images, or impulses come again and again and are distressing, frightening, and often shame-producing.'

While many people associate OCD with excessive cleaning or handwashing, the disorder can manifest in numerous ways.

Understanding the different types of OCD can help individuals recognise symptoms, seek appropriate treatment and reduce the stigma surrounding this often-misunderstood condition.

In this guide, we'll explore the most common OCD subtypes, their symptoms and how they impact daily life.

What is OCD?

Though it is widely viewed as a quirk of a person’s personality, the International OCD Foundation reminds us that OCD is actually a very ‘serious and often debilitating mental health disorder.’

Contrary to common misunderstanding, obsessive compulsivity isn’t confined to a clearly defined demographic. It can affect people of all ages and walks of life and begins to manifest when a person gets trapped in a cycle of obsessions and compulsions.

To the opening question, What is OCD?, the authors of Brain Lock have a simple answer. ‘When your obsessions and compulsions are bad enough to cause significant functional impairment, you have OCD.’

And though the neurological underpinnings are not fully understood, it is characterised by two main components:

• Obsessions: Intrusive, unwanted thoughts, images, or urges that cause anxiety or distress.

• Compulsions: Repetitive behaviours or mental acts performed to reduce anxiety or prevent a feared outcome.

Although OCD symptoms vary significantly from person to person, many individuals experience recurring themes that fall into identifiable categories.

10 Types of OCD

The review of the definition and outline of the components of OCD provides context to this challenging condition. In addition, these insights serve as a backdrop against which the following types of OCD can be better understood.

We now turn our attention to 10 types of OCD. These types are among the most common expressions of the condition, which is why they have been selected.

But as one leading health institution notes, due to the complexity of the human mind, the range and obsessive-compulsive disorder causes could be without limit.

1. Contamination OCD

Contamination OCD is one of the most recognised forms of obsessive-compulsive disorder. Individuals with this subtype experience intense fears about germs, illness, dirt, chemicals, or environmental contaminants.

Common obsessions

• Fear of bacteria, viruses, or disease

• Concerns about bodily fluids

• Fear of touching contaminated surfaces

Common compulsions

• Excessive handwashing

• Repeated showering or cleaning

• Avoiding public places or physical contact

People with contamination OCD often spend significant amounts of time cleaning or avoiding situations they perceive as unsafe.

2. Checking OCD

Checking OCD involves persistent doubts and fears that something bad may happen due to negligence or mistakes.

Common obsessions

• Fear of causing a fire

• Worries about leaving doors unlocked

• Concerns about harming others unintentionally

Common compulsions

• Repeatedly checking locks, appliances, or switches

• Seeking reassurance from others

• Returning home to verify safety

Checking behaviours can become extremely time-consuming and interfere with work, relationships and daily responsibilities.

3. Harm OCD

Harm OCD is characterised by intrusive thoughts about causing harm to oneself or others. Importantly, individuals with this subtype do not want to act on these thoughts and are often deeply distressed by them.

Common obsessions

• Fear of hurting a loved one

• Violent intrusive thoughts

• Fear of losing control

Common compulsions

• Avoiding sharp objects

• Mental reviewing of past actions

• Seeking reassurance that they are not dangerous

Because these thoughts feel so disturbing, many sufferers avoid discussing them, leading to increased anxiety symptoms and isolation.

4. Relationship OCD (ROCD)

Relationship OCD, often abbreviated as ROCD, focuses on doubts and uncertainties within romantic relationships.

Common obsessions

• Questioning whether they truly love their partner

• Constant doubts about compatibility

• Fear of making the wrong relationship choice

Common compulsions

• Comparing relationships

• Seeking reassurance from friends or family

• Constantly analysing feelings

Relationship OCD can create significant stress and may lead individuals to repeatedly question otherwise healthy relationships.

5. Symmetry and ordering OCD

People with Symmetry OCD experience a strong need for balance, order, or exactness. Ordering OCD gained wider public awareness when David Beckham disclosed that he suffered from it. He reported his obsession with ensuring that all the jars and tins in his kitchen cupboards were perfectly aligned and in size order.

Common obsessions

• Feeling that objects are uneven or misplaced

• Distress when things appear asymmetrical

• Fear that something bad will happen if items aren't arranged correctly

Common compulsions

• Arranging objects repeatedly

• Counting rituals

• Repeating actions until they feel "just right"

This subtype often involves a powerful sense of discomfort rather than a specific fear of harm.

6. Pure O OCD

Pure O OCD, short for "Purely Obsessional OCD," is somewhat misleading because compulsions still exist, but they often occur mentally rather than physically.

Common obsessions

• Existential questions

• Religious concerns

• Sexual intrusive thoughts

• Harm-related fears

Common mental compulsions

• Mental reviewing

• Rumination

• Internal reassurance

• Analysing thoughts repeatedly

Because symptoms are largely invisible, Pure O can be difficult to identify and diagnose.

7. Sexual Orientation OCD (SO-OCD)

Sexual Orientation OCD involves intrusive doubts about one's sexual orientation, regardless of their actual identity.

Common obsessions

• Fear of being attracted to a different gender

• Constant questioning of sexual identity

• Hyperawareness of attraction

Common compulsions

• Checking physical reactions

• Comparing attractions

• Seeking reassurance online or from others

The anxiety stems from uncertainty rather than genuine exploration of sexual identity.

8. Religious or scrupulosity OCD

Scrupulosity OCD combines obsessive-compulsive symptoms with religious or moral concerns. (In Brain Lock, the authors detail the difficulties of a young man, Christopher, whose 'terrible blasphemous thoughts' prevented him from forming intimate relationships.)

Common obsessions

• Fear of offending God

• Worries about sinning

• Excessive moral responsibility

Common compulsions

• Repetitive praying

• Seeking religious reassurance

• Confessing excessively

Individuals often feel trapped by impossible standards of moral perfection. This need to appear perfect in the eyes of God stifles emotional expression while imposing highly restrictive limits on day-to-day life.

9. Existential OCD

Existential OCD centres around intrusive thoughts concerning the nature of reality, life and existence.

Common obsessions

• Questions about the meaning of life

• Fear that reality isn't real

• Concerns about consciousness

Common compulsions

• Excessive philosophical research

• Mental debates

• Seeking certainty about unanswerable questions

Unlike normal curiosity, these thoughts become repetitive, distressing and difficult to control.

10. Hoarding-related OCD

Although Hoarding Disorder is now classified separately from OCD in many diagnostic frameworks, some individuals with OCD experience hoarding-related symptoms.

Common obsessions

• Fear of losing important information

• Emotional attachment to possessions

• Fear of needing items in the future

Common compulsions

• Saving unnecessary objects

• Difficulty discarding items

• Accumulating excessive belongings

These behaviours can significantly affect living conditions and quality of life.

Can you have more than one type of OCD?

Yes. Many people experience symptoms from multiple OCD subtypes simultaneously. For example, someone may struggle with contamination fears while also experiencing intrusive harm-related thoughts.

Additionally, OCD themes can change over time. A person who initially develops checking OCD may later experience relationship OCD or Pure O symptoms.

Because OCD is highly individualised, professional assessment is important for accurate diagnosis and treatment planning.

Treatment for types of OCD

Fortunately, OCD is highly treatable. The most effective treatments, which I explain in more detail in my blog Exploring Different Types of Therapy, include:

• Cognitive Behavioural Therapy (CBT): CBT helps individuals identify and challenge unhelpful thought patterns that contribute to obsessive-compulsive symptoms.

• Exposure and Response Prevention (ERP): ERP is considered the gold-standard treatment for OCD. It involves gradually facing feared situations while resisting compulsive behaviours.

• Medication: Selective Serotonin Reuptake Inhibitors (SSRIs) are commonly prescribed to help reduce OCD symptoms.

• Mindfulness-Based Approaches: Mindfulness techniques can help individuals develop a healthier relationship with intrusive thoughts without engaging in compulsions.

---

Final thoughts

Understanding the different types of OCD is an important step toward recognising symptoms and accessing effective support.

Whether someone struggles with contamination OCD, checking OCD, relationship OCD, Pure O, or another subtype, the underlying cycle of obsessions and compulsions remains the same.

With proper treatment, education, and support, people living with obsessive-compulsive disorder can significantly reduce symptoms and improve their quality of life.

If OCD symptoms are affecting your daily functioning, speaking with a qualified mental health professional can be a valuable next step toward recovery.

---

About Dr Laura Allen –

A Chartered Psychologist & Integrative Therapist, Dr Allen specialises in a broad range of therapeutic methods. She is a published author of numerous research papers and Interactive Courses in the field of Psychology. Dr Allen works one-to-one with clients and supervises other practitioners. She is also a proud member of the British Psychological Society assessment team supporting psychologists in training.