What is cognitive behavioural therapy, and what actually happens when you try it? Usually shortened to CBT, it is a structured talking therapy that looks at the links between what you think, how you feel and what you do. Rather than treating thoughts, emotions and behaviour as separate problems, CBT explores how they can form a cycle that keeps distress going. The aim is not to force “positive thinking”, but to help you notice patterns, test whether they are useful or accurate, and practise different responses.
CBT is one of the best-known psychological therapies in the UK and is used for a range of mental health difficulties. The exact form depends on the problem being treated, so two people may have quite different CBT sessions even though the underlying approach is similar.
How does cognitive behavioural therapy work?
CBT is based on the idea that situations can trigger thoughts or interpretations, which influence emotions, physical sensations and behaviour. Those responses can then reinforce the original thought. Therapy helps you map that cycle and identify places where a change may make the problem easier to manage.
Imagine someone who feels anxious about speaking in work meetings. Before a meeting, they think, “I’ll say something stupid and everyone will notice.” Their anxiety rises, they stay silent, and they feel immediate relief when the meeting ends. But avoiding speaking means they never discover whether their prediction was accurate. In CBT, the person might examine the prediction, plan a small step such as asking one prepared question, then compare what they expected with what actually happened.
This practical, test-and-learn style is an important part of CBT therapy. The therapist and client work collaboratively, rather than the therapist simply telling the client what to think.
What happens during CBT sessions?
A course usually begins with an assessment. The therapist will ask about the difficulties you are experiencing, how they affect daily life, what may be keeping them going and what you would like to change. Together, you may agree specific goals, such as returning to an avoided activity, improving sleep routines or coping differently with low mood.
During later CBT sessions, you may review the week, focus on a particular situation or pattern, learn a strategy and agree something to practise before the next appointment. NHS information says CBT can be delivered one-to-one, in a group, through guided self-help, and in person, online or by phone. The NHS says people will usually have around 5 to 15 sessions, although the number can vary depending on the problem and treatment plan.
Practice between appointments matters because CBT is designed to build skills for everyday life. You may be asked to keep a brief record of situations, thoughts and feelings, try a behavioural exercise, or repeat a technique discussed with your therapist.
Common CBT techniques
There is no single exercise that defines CBT. Therapists choose techniques according to the difficulty being treated and the person’s goals. Common CBT techniques include identifying patterns in thoughts, considering alternative explanations, planning manageable activities, solving practical problems, testing predictions and gradually approaching situations that have been avoided.
Thought records and reappraisal
A thought record can help you slow down a difficult moment and separate the situation from your interpretation of it. You might record what happened, the thought that appeared, the emotion you felt and evidence that supports or does not support the thought. The goal is usually a more balanced view, not replacing every uncomfortable thought with a cheerful one.
Behavioural experiments
A behavioural experiment turns a belief into something that can be tested. If you believe that making a small mistake will lead colleagues to reject you, for example, you and your therapist might design a safe, realistic way to test part of that prediction and review the outcome.
Gradual exposure and changing avoidance
For some anxiety-related problems, CBT may involve gradually facing feared situations rather than repeatedly avoiding them. For conditions such as obsessive compulsive disorder, specialised CBT can include exposure and response prevention. Techniques should be matched to the condition and introduced with appropriate professional guidance when symptoms are severe or complex.
What can CBT help with?
The NHS recommends or uses CBT for a number of mental health problems, including depression, several anxiety disorders, obsessive compulsive disorder, post-traumatic stress disorder and eating disorders. It may also be used as part of treatment for other conditions. Whether CBT is offered alone or alongside another treatment depends on the diagnosis, symptoms, preferences and clinical guidance.
CBT is not automatically the best choice for every person. Some people prefer another form of therapy, while others may need medication, specialist treatment or a combination of approaches. A proper assessment helps determine what is appropriate. Related internal topics worth exploring include anxiety symptoms and support, talking therapy options, and how to access mental health support in the UK.
How to access CBT in the UK
In England, adults can often self-refer to NHS Talking Therapies for anxiety and depression without first seeing a GP. In some areas, self-referral is available from age 16. For certain conditions, including eating disorders, bipolar disorder, personality disorders or psychosis, a GP or specialist referral may be needed.
CBT is also available privately. If choosing a private practitioner, check their training, experience with the problem you want help with, professional accreditation and how they monitor progress. You can also ask what approach they use, how many sessions they initially recommend and what happens if the therapy is not helping.
Frequently asked questions
Is CBT just about changing negative thoughts?
No. Cognitive behavioural therapy explained accurately includes both cognitive and behavioural work. Depending on the problem, treatment may focus heavily on behaviour, avoidance, routines, exposure, problem-solving or practical experiments, as well as thoughts and beliefs.
How long does CBT take to work?
There is no fixed point at which everyone notices improvement. Some people find particular skills useful early, while others need more time and practice. Treatment length varies by condition, severity, goals and response, so progress is best reviewed with the therapist.
Can I do CBT by myself?
Some CBT-based self-help tools can be useful, particularly for milder difficulties, and guided self-help is part of NHS care for some problems. However, self-help is not a substitute for professional assessment when symptoms are severe, persistent, complex or causing significant risk or impairment.
Does CBT focus on the past?
CBT usually focuses mainly on current patterns and what can be changed now, but that does not mean the past is ignored. Earlier experiences may be discussed when they help explain beliefs, coping strategies or patterns that are relevant to the present.
What to take away
CBT is a practical, collaborative therapy that helps people understand how thoughts, feelings, physical sensations and behaviour can influence one another. Its strength is not a single technique, but the process of identifying a pattern, testing new responses and practising useful skills outside the therapy room. If you are considering CBT, the most useful next step is an assessment that looks at your particular difficulty, goals and treatment options rather than assuming one approach suits everyone.