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Obsessive-compulsive disorder (OCD) is a mental health problem. Symptoms typically include recurring thoughts and repetitive behaviours in response to the recurring thoughts. A common example is recurring unwanted thoughts about germs and dirt, with a need to wash your hands repeatedly to 'clean off the germs'. This can be not only very distressing, but also very time consuming and intrusive into daily life.

What are obsessions?

Obsessions are unpleasant thoughts, mental images or urges that keep coming into your mind. Obsessions are not simply worries about your life problems. Common obsessions include:

• Fears about contamination with dirt, germs, viruses (for example, HIV), etc.

• Worries about doors being unlocked, fires left on, causing harm to someone, etc.

• Intrusive thoughts or images of swearing, blasphemy, sex, someone harmed, etc.

• Fear of making a mistake or behaving badly.

• A need for exactness in how you order or arrange things.

• A need to collect things that others might throw away (hoarding).

These are examples. Obsessions can be about all sorts of things. Obsessive thoughts can make you feel anxious or disgusted. You normally try to ignore or suppress obsessive thoughts; for example, you may try to think other thoughts to neutralise the obsession.

What are compulsions?

Compulsions are thoughts or actions that you feel you must do or repeat. Usually the compulsive act is in response to an obsession. A compulsion is a way of trying to deal with the distress or anxiety caused by an obsession.

For example, you may wash your hands every few minutes in response to an obsessional fear about germs. Another example is you may keep on checking that doors are locked, in response to the obsession about doors being unlocked. Other compulsions include repeated cleaning, counting, touching, saying words silently, arranging and organising - but there are others.

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How does obsessive-compulsive disorder affect your life?

The obsessions that you have with OCD can make you feel really ängstlich and distressed. The compulsions that you have may help to relieve this distress temporarily but obsessions soon return and the cycle begins again.

The severity of OCD can range from some life disruption to causing severe distress. You know that the obsessions and compulsions are excessive or unreasonable. However, you find it difficult or impossible to resist them.

OCD affects people in different ways. For example, some people spend hours carrying out compulsions and, as a consequence, cannot get on with normal activities. Some people do their compulsions over and over again in secret (like rituals). Other people may seem to cope with normal activities but are distressed by their recurring obsessive thoughts. OCD can affect your work (or schoolwork in children), relationships, social life and quality of life.

Many people with OCD do not tell their doctor or anyone else about their symptoms. They fear that other people might think they are crazy. Some people with OCD may feel ashamed of their symptoms, especially if they contain ideas of harming others or have a sexual element. As a result, many people with OCD also become depressed. However, if you have OCD, you are not crazy or mad. It is not your fault and treatment often works. If you are concerned that you may be depressed (for example, if you have been feeling very down and you no longer take pleasure in the things that you used to enjoy), you should see your doctor.

What causes OCD?

The cause of OCD is not clear. Slight changes in the balance of some brain chemicals (neurotransmitters) such as serotonin may play a role. This is why medication is thought to help (see below).

Also, the chance of developing OCD is higher than average if you have a first-degree family member who is affected (mother, father, brother, sister, child). So, there may be some genetic element to OCD. However, so far, no genes have been found to be linked with OCD.

Other theories about the cause of OCD have been suggested but none proved.

Who gets obsessive-compulsive disorder?

It is thought that between 1 to 3 in 100 adults have OCD. Anyone at any age can develop OCD but it usually first develops between the ages of 18 and 30. Up to 2 in 100 children are also thought to have OCD.

OCD is usually a persistent condition. This means it tends not to be cured, but you learn ways to manage it.

How is obsessive-compulsive disorder diagnosed?

If you are concerned that you may have OCD, you should see your doctor and explain your concerns. They may start by asking some of the following questions. These questions can act as a screen for possible OCD:

• Do you wash or clean a lot?

• Do you check things a lot?

• Is there any thought that keeps bothering you that you would like to get rid of but cannot?

• Do your daily activities take a long time to finish?

• Are you concerned about putting things in a special order, or are you upset by mess?

• Do these problems trouble you?

A more detailed assessment is then needed for OCD to be diagnosed. This may either be carried out by your doctor or by a specialist mental health professional. The assessment will look at any obsessional thoughts and compulsions that you have and how they affect you and your daily life. Children with OCD may be referred to a specialist mental health team which is experienced in assessing and treating children with OCD.

What is the treatment for obsessive-compulsive disorder?

The usual treatment for OCD is:

• Cognitive behavioural therapy (CBT); oder

• Medication, usually with a selective serotonin reuptake inhibitor (SSRI) antidepressant medicine; oder

• A combination of CBT plus an SSRI antidepressant medicine.

Cognitive behavioural therapy (CBT) for obsessive-compulsive therapy

Cognitive behavioural therapy is a type of therapy that deals with your current thought processes and/or behaviours and aims to change them by creating strategies to overcome negative thought patterns, which may help you to manage OCD more effectively. Siehe das separate Informationsblatt mit dem Titel Kognitive Verhaltenstherapie (KVT).

How effective is CBT for OCD?

Of those who complete a course of CBT, there is a marked improvement in more than 3 in 4 cases. Symptoms may not go completely but usually the obsessions and compulsions become much less of a problem. About 1 in 4 people with OCD find CBT too stressful and not for them. However, cognitive therapy alone may help some people who find the full CBT too stressful.

As a general rule, if two courses of CBT have failed to help, the person is referred to an OCD specialist.

Do-it-yourself CBT

CBT with the help of a trained therapist is best. However, some people prefer to tackle their problems themselves. There is a range of self-help books and leaflets on self-directed CBT. More recently, interactive CDs and websites are being developed and evaluated for self-directed CBT.

Medicines used to treat obsessive-compulsive disorder

SSRI-Antidepressiva

Although they are often used to treat depression, SSRI antidepressant medicines can also reduce the symptoms of OCD, even if you are not depressed. They work by interfering with brain chemicals (neurotransmitters) such as serotonin, which may be involved in causing symptoms of OCD. SSRI antidepressants include: citalopram, Fluoxetin, fluvoxamine, Paroxetin, Sertralin.

Other medicines that are used to treat OCD

If SSRIs do not help much, or cannot be taken, another type of antidepressant called clomipramine is sometimes used. This is classed as a tricyclic antidepressant and used to be the main medication treatment for OCD before SSRIs became available. Occasionally, other medicines that are used to treat mental health disorders are used.

Transcranial magnetic stimulation (TMS)

• The National Institute for Health and Care Excellence (NICE) has published technical guidance on the use of transcranial magnetic stimulation (TMS) in the treatment of OCD. This is in the Further Reading section below.

• The aim of the treatment is to reduce the symptoms. TMS involves applying electromagnetic pulses to parts of your brain. These pulses are designed to stimulate the brain cells (neurons) to produce small amounts of electricity. You will be awake during the treatment and seated in a comfortable chair. The person doing the treatment will apply an electromagnetic coil to various parts of your head.

• Usually, you will be asked to attend for daily sessions for a few weeks. Each session lasts about half an hour. The treatment is perfectly safe, but more evidence is needed as to how well it works. For this reason, NICE expects that doctors should only use it as part of a research trial.

What is the outlook for obsessive-compulsive disorder?

If OCD is not treated, obsessive thoughts and compulsions may not improve and may get worse in some people. However, with treatment, many people's symptoms can be brought under control and some people may be completely cured.

If you have OCD, there is a risk that it can return even after successful treatment and recovery. If your symptoms do come back, be sure to see a doctor for further treatment.