OCD treatment and addiction rehabilitation

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a man sitting at a table sorting out his medication contemplating whether he should seek ocd treatment alongside his addiction challenes
Page last updated Monday 29th Jun 2026
Page written by Victoria McCann

Understanding obsessive-compulsive disorder can be difficult. It is often misunderstood, and there’s lots of misinformation out there. You may have heard some things about the condition, such as people with OCD have a need to constantly clean or be extremely neat. 

Getting a better understanding of OCD and what it’s really like is important, whether you are trying to find out whether OCD is part of your life or whether you’re trying to learn more about it so you can support a loved one.

With OCD, there’s often a sense that something isn’t quite complete or safe, no matter how many times it’s checked or thought through. The mind keeps pushing for certainty, creating an exhausting internal loop where relief only ever feels temporary.

This page explores what Obsessive Compulsive Disorder is like and the OCD treatment that is available to you across the UK and Europe with Castle Health. Understanding how it works helps explain why structured treatment can be effective. 

What is obsessive-compulsive disorder (OCD)?

When you hear about it from TV shows, it can be easy to think that the symptoms of OCD aren’t as serious as they are. Stereotypes often lead us to see conditions like OCD as less severe.

However, OCD is a serious mental health condition where people experience intrusive, repetitive thoughts that can interfere with daily life. These intrusive thoughts can cause a person to develop compulsive behaviours. Those compulsive behaviours can often provide some relief, but the cycles often repeat themselves and can get much worse over time. 

The obsessive thoughts are not a choice. They often come in cycles. It often begins with doubt (obsessional doubt), and it can feel overwhelming when a person is dealing with it in cycles all day long.

People with OCD often know their fears aren’t logical, but the thoughts still feel real and urgent. At the time, it can seem like an impossible task to ignore them, particularly as the compulsions provide some relief from the anxiety and stress.

a man sitting at a table sorting out his medication contemplating whether he should seek ocd treatment alongside his addiction challenes
What causes OCD?

No one chooses obsessive thoughts and compulsions. It starts when the brain learns to treat fear like an emergency.

It can be caused by:

  • Personality: A person who may already be anxious or who is extremely independent, or someone who is already very neat and regimented about organisation.
  • Changes in the brain: It is widely recognised that people with OCD show small differences in the brain, such as a high level of activity.
  • Family history: A person may adopt OCD as a learned behaviour from a family member, or it could be passed on genetically.
  • Life events: OCD may develop after significant life events, such as bullying, neglect, or even after childbirth or the death of a loved one.

It’s not caused by weakness or poor choices, but rather the mind getting caught in a false alarm loop. This can send danger signals even when there’s no real risk.

Intrusive thoughts

Intrusive thoughts are unwanted mental images, urges, or ideas that happen without warning and feel difficult to avoid. Most people experience them from time to time. With OCD, the difference is in what happens next. 

Rather than the thought passing, the mind treats it as a threat that needs to be resolved. The urge to check or seek reassurance is what keeps the cycle going.

It is important to know that intrusive thoughts or just that. They are an intrusion. They aren’t who you are or what you represent. Understanding what they are is part of being able to manage them and make progress.

"I contacted Castle Health [formerly CATCH] with a view to getting online support after a period in rehab. They recommended recovery coaching and arranged for me to meet my coach in person as the first of 10 meetings. I continued the coaching on Zoom as I live in France. I was very happy with my 10 sessions and feel I am in a good place to continue my recovery."

Bev Brown – (02/11/22)

The signs and symptoms of OCD

For many people, OCD starts in small ways. A thought appears. Then there’s an urge to do something about it. 

The thoughts often centre on things like:

  • Harm or danger
  • Getting ill or touching germs
  • Making mistakes
  • Worries about people close to you
  • A feeling that something isn’t right

To get some relief, people start performing actions or rituals. Not because they want to, but because it feels like the only way to quiet the fear and make things ‘right’. This can involve common actions such as:

  • Checking things multiple times
  • Washing their hands or cleaning
  • Repeating words or actions
  • Asking for reassurance
  • Running the same thoughts in your head

Over time, these patterns can begin to shape daily life in ways that feel restrictive or exhausting. Still, on bad days when it feels like there’s no way out, it’s important to remember support does exist.

a man sitting at a table completing an addiction screening questionnaire

Private OCD treatment options in the UK and Europe

In the UK and elsewhere in Europe, some people explore private OCD treatment when public service wait times become unmanageable. Private care can sometimes offer more flexibility in how and when support is accessed, particularly when symptoms are starting to affect daily life.

Private treatment for OCD may involve outpatient therapy, structured day support, or residential care when OCD is part of a wider picture that includes addiction.

What is ERP OCD treatment?

Exposure and Response Prevention, or ERP, is one of the main therapies used to treat OCD. It is widely recommended in the UK and internationally because it helps people respond differently to anxiety over time.

With ERP, people face the thing they fear, then sit with the urge to fix it, until the urge starts to fade. At first, this feels uncomfortable. Yet, over time, the brain learns that the outcome you’re fearing doesn’t actually happen.

The goal isn’t to remove every anxious thought, but to stop OCD from running the person’s life.

a patient being consulted on the cannabis detox he's about to undertake, by a nurse

Treatment for obsessive-compulsive disorder at Castle Health

OCD treatment takes time, and it isn’t something we oversimplify. At Castle Health, our approach is careful, evidence-based, and shaped around the person rather than the diagnosis.

We have been providing addiction treatment for over 40 years, and OCD care is part of that long-standing clinical experience. Our services are designed to support people at different stages, whether OCD is the primary concern or part of a wider picture that includes addiction.

OCD treatment at Castle Health combines structured psychological therapies with psychiatric input when appropriate. Care is delivered across outpatient mental health services through Castle Health, specialist residential treatment for addiction at Castle Craig, and integrated support during addiction treatment at Smarmore Castle.

Treatment options for obsessive-compulsive disorder at Castle Health may include:

  • Cognitive behavioural therapy (CBT)
  • Exposure and response prevention (ERP)
  • Medication for OCD 
  • Integrated treatment for co-occurring mental health conditions or addiction

By working across outpatient and residential settings, we’re able to offer consistent, joined-up care that supports both symptom management and longer-term recovery.

a nurse explaiing the process of a cocaine detox to her patient
Outpatient care

OCD mental health care is available within the Castle Health network. Private Consultant Psychiatrist, Dr Peter McCann MBBS, MSC, MRCPsych, offers private OCD assessments and referrals for treatment to accredited mental health treatment providers.. This is available in person if you live in Scotland, or online.

This suits people who want support while still keeping up with work, study, or family.

Residential treatment

For some people, home is where OCD feels loudest. The same rooms, the same routines, and the same triggers are there every day. 

During residential treatment, patients who are reassessed as having a need can access OCD treatment alongside therapy for addiction, as it is treated as a co-occurring condition.

What to expect during OCD therapy

OCD therapy in the UK or across Europe usually consists of Cognitive Behavioural Therapy (CBT), alongside ERP treatment, which has been recognised as an effective treatment for improving anxiety by confronting obsessive behaviours.

OCD therapy focuses on understanding how your mind reacts to fear, and how those reactions have shaped your habits.

a couple seeking treatment about to shake hands with an admissions co-ordinator
Initial assessment

At Castle Health, you’ll begin with a 30-minute assessment, which considers your OCD symptoms and your overall mental health. This gives your clinician a clear picture of what you need. If you are seeking treatment for addiction as well, your need for OCD treatment will be assessed alongside your addiction.

Your personalised treatment plan

No two people will experience OCD in exactly the same way, so your plan is built around your symptoms and what you want to achieve. 

If you are seeking standalone mental health treatment, Dr McCann will recommend the type of treatment you require and will provide a referral to the most appropriate, accredited treatment provider.

Ongoing support and aftercare

Support doesn’t stop when residential treatment ends. That’s often when people realise they still need it most. We offer ongoing support and aftercare to help you maintain progress and manage challenges over time.

Recovery hub

Read more about addiction and OCD treatment

More resources

Why choose our OCD treatment centre?

Finding the right OCD treatment centre is a personal decision. It depends on how severe the symptoms feel and how much support you need, as well as what therapy options fit your life.

Specialist expertise

Our clinicians within the Castle Health network work with OCD regularly and understand how distressing it can be. This experience matters when treatment feels difficult.

Accreditations and outcomes

We use therapies that are supported by research. That doesn’t mean every person’s OCD will disappear, but many people learn how to manage it in a way that gives them back more of their life.

Success Stories

We’ve helped many people turn their lives around

Get help today

Take the first step in your recovery journey

We are here to listen, guide and help you every step of the way. Call us today and together we can find a solution that suits you.

Our admissions process is confidential and designed to suit and support you and your circumstances. Find out more about the Admissions process.

Telephone

From the UK: 020 3098 2503
International: +44 (20) 3098 2503

Frequently asked questions about OCD treatment

How do I find an OCD specialist therapist in London?

A full assessment and referral can be obtained from the private psychiatry service within our network. Dr McCann can recommend an accredited provider of CBT or ERP to support your OCD treatment in a location that is suitable for you.

What types of medication help with OCD symptoms?

A consultant psychiatrist, such as Dr McCann, can provide medication for the management of your symptoms if the need is identified during your assessment. This includes Serotonin Reuptake Inhibitors (SSRIs) and also covers treatment-resistant OCD.

What is the best OCD treatment for adolescents?

Adolescents with OCD may benefit from specialist mental health services that work with young people, offering age-appropriate therapy and family support. At Castle Health, we do not provide treatment to anyone under the age of 16.

Can OCD go away with treatment?

With the right CBT or ERP treatment, you can take important steps towards gaining control and managing your OCD long-term. Reaching out for help is a good place to begin, and our team is on hand to provide advice.