Obsessive-Compulsive Disorder Explained

Obsessive-Compulsive Disorder

What is Obsessive-Compulsive Disorder?

Obsessive-Compulsive Disorder (OCD) is a mental health disorder characterised by two main components: obsessions and compulsions. It affects people of all ages and can be distressing and disruptive to daily life.


These are intrusive, unwanted, and distressing thoughts, images, or urges that repeatedly enter a person’s mind. Individuals with OCD often find these thoughts disturbing and may try to ignore or suppress them. Common obsessions include fears of contamination, harming others, making mistakes, or religious and moral concerns.


Compulsions are repetitive behaviours or mental acts that people with OCD feel compelled to perform in response to their obsessions. These actions are often aimed at reducing anxiety or preventing a feared event from occurring. However, they are usually excessive and not realistically connected to the feared outcome. Common compulsions include excessive handwashing, checking, counting, repeating actions, and seeking reassurance.

People with OCD typically recognise that their thoughts and behaviours are excessive and irrational, but they cannot control them. Obsessions and compulsions can consume a significant amount of time and interfere with daily activities, work, relationships, and overall quality of life.

OCD is considered a chronic condition, but it can be effectively managed with the proper treatment, which may include psychotherapy (particularly cognitive-behavioural therapy), medication (such as selective serotonin reuptake inhibitors or SSRIs), or a combination.

If you or someone you know is experiencing symptoms of OCD, it’s essential to seek professional help from a mental health specialist for a proper evaluation and appropriate treatment. Early intervention can lead to better outcomes and improved quality of life.


What are the Causes of Obsessive-Compulsive Disorder?

The exact causes of Obsessive-Compulsive Disorder (OCD) are not fully understood, but it is believed to result from a combination of genetic, biological, environmental, and psychological factors. Here are some factors that may contribute to the development of OCD:


There is evidence of a genetic component to OCD. If you have a first-degree relative (parent, sibling, or child) with OCD, you may have a higher risk of developing the disorder yourself. Researchers have identified specific genes that may be associated with OCD, but the exact genetic mechanisms are still being studied.

Brain Chemistry and Structure

Changes in brain chemistry, particularly involving the neurotransmitter serotonin, have been implicated in OCD. Serotonin plays a role in regulating mood, anxiety, and behaviour. Abnormalities in specific brain areas, including the orbitofrontal cortex, cingulate cortex, and basal ganglia, have also been observed in individuals with OCD.

Environmental Factors

Some environmental factors may contribute to the development or exacerbation of OCD. Traumatic events, significant life changes, and chronic stress may trigger or worsen symptoms in susceptible individuals. However, OCD is not solely caused by environmental factors and requires a genetic predisposition.

Learned Behavior

In some cases, OCD symptoms can be learned or reinforced by the environment. For instance, if someone fears germs and repeatedly washes their hands to alleviate the anxiety, this behaviour may become ingrained to cope with anxiety.

Cognitive Factors

Certain cognitive factors, such as having a perfectionist or overly responsible personality, may contribute to developing OCD. People with OCD often have intrusive thoughts that trigger anxiety, and their attempts to suppress or control these thoughts can lead to the development of compulsive behaviours.

Neurological and Immunological Factors

Some research suggests that neurological and immunological factors might be involved in developing OCD. Infections, such as streptococcal infections, have been linked to the onset of a specific subtype of OCD called Pediatric Autoimmune Neuropsychiatric Disorders Associated with Streptococcal Infections (PANDAS).

It’s important to note that while these factors may contribute to the development of OCD, it is a complex disorder with no single cause. Individuals may have different combinations of factors contributing to their OCD symptoms. Understanding the underlying causes can help guide treatment approaches and improve outcomes for individuals with OCD. If you or someone you know is experiencing symptoms of OCD, seeking professional help from a mental health specialist is essential for an accurate diagnosis and effective treatment.

How is Obsessive-Compulsive Disorder Treated?

Obsessive-Compulsive Disorder (OCD) is a treatable condition, and effective therapeutic approaches can significantly improve the symptoms and quality of life for individuals with OCD. Treatment for OCD typically involves a combination of psychotherapy, medication, and sometimes lifestyle changes. The specific treatment plan will depend on the severity of the symptoms and individual preferences. Here are some common treatment approaches:

Cognitive-Behavioural Therapy (CBT)

CBT is considered the first-line treatment for OCD. In particular, a specific form of CBT called Exposure and Response Prevention (ERP) is highly effective. ERP involves exposing individuals to the situations, thoughts, or objects that trigger their obsessions (exposure) and preventing the corresponding compulsive behaviours (response prevention). Over time, this helps to reduce the anxiety associated with the obsessions and weakens the link between the obsessions and compulsions.


Selective Serotonin Reuptake Inhibitors (SSRIs) are the most commonly prescribed medications for OCD. These antidepressants help increase serotonin levels in the brain, reducing obsessive thoughts and compulsive behaviours. Working with a psychiatrist or healthcare provider is essential to find the right medication and dosage for each individual.

Cognitive Therapy

Cognitive therapy for OCD focuses on identifying and challenging the irrational and negative thought patterns contributing to obsessions and compulsions. By learning to reframe these thoughts, individuals can reduce the power of OCD’s grip on their lives.

Support Groups

Joining support groups for OCD can be helpful, as it allows individuals to connect with others who understand their experiences and challenges. Sharing experiences and coping strategies can provide a sense of validation and reduce feelings of isolation.

Lifestyle Changes

Regular physical exercise, maintaining a balanced diet, managing stress, and getting enough sleep can all contribute to better mental health and potentially reduce OCD symptoms.

Family Therapy

Family therapy may be beneficial in some cases, primarily when OCD significantly affects family dynamics or relationships. Family members can learn about OCD, how to support their loved ones, and how to avoid enabling compulsive behaviours.

Individuals with OCD must work with mental health professionals experienced in treating OCD. Treatment success often depends on the person’s willingness to participate in therapy and follow through with recommendations actively. A combination of therapies tailored to the individual’s specific symptoms and needs can lead to significant improvements in managing OCD and enhancing overall well-being.

Dr Clem Bonney

Dr Clem Bonney, as an Occupational Physician and General Practitioner, has assisted those afflicted with OCD in managing their symptoms and improving their quality of life.  This includes assisting workplaces to understand and, where possible, accommodate the behaviours associated with OCD.