What Is Hypnosis? How It Works in the Brain and Its Therapeutic Uses

Introduction

Have you ever been so absorbed in a book that you lost track of time? Or so focused driving on a familiar road that you can’t remember the last few miles? You have experienced a natural hypnotic state.

Hypnosis is a natural mental state of concentrated focus with heightened suggestibility. It is not sleep, it is not a loss of control, it is not theater. It is a neuroscientific phenomenon documented since the 18th century, with growing therapeutic applications in modern medicine.

The World Health Organization has formally recognised hypnotherapy as a valid complementary practice since 1983. Major professional psychology bodies recognise hypnosis as a therapeutic resource that complements CBT (Hofmann et al., 2012 — a meta-analysis confirming the efficacy of CBT for anxiety and depression) and ACT (Hayes et al., 2006 — an acceptance and commitment protocol with sustained efficacy).

I am Fabio Morus, a clinical hypnotherapist, and in this guide you will understand: what hypnosis is, what happens in the brain during trance, the myths and the facts, the signs that you are in a trance, and how hypnotherapy treats anxiety, depression, chronic pain, and emotional trauma.

Key Takeaways

• Hypnosis is a natural state of concentrated focus, recognised by the WHO as a valid complementary practice since 1983 (WHO, 1983).
• 60-70% of people are moderately hypnotizable; there is no such thing as “not hypnotizable” (APA Division 30, 2024).
• Level A evidence for anxiety, chronic pain, PTSD, phobias, and smoking cessation (APA, 2024).
• Sessions last 50-60 min; simple cases resolve in 3-5 sessions, complex ones in 12-30.

1. What Is Hypnosis

Hypnosis is an altered state of consciousness characterized by concentrated focus, deep relaxation, and greater receptivity to therapeutic suggestions.

1.1. Technical definition

According to the American Psychological Association (APA), hypnosis is:

“A state of consciousness involving focused attention and reduced peripheral awareness characterized by an enhanced capacity for response to suggestion” (APA, 2024).

Citation capsule: The APA’s official definition frames hypnosis as a measurable state of focused attention with heightened responsiveness to suggestion, supported by decades of research in neuroimaging and psychometrics.

1.2. What hypnosis is NOT

• ❌ It is not sleep (the brain stays active)
• ❌ It is not a loss of control (you always keep your autonomy)
• ❌ It is not stage theater (clinical hypnosis is a serious technique)
• ❌ It is not magic (it has a neuroscientific basis)
• ❌ It is not mental weakness (intelligent people are more hypnotizable)

1.3. What it is

• ✅ A natural state of deep focus
• ✅ A temporary shift in attention
• ✅ Expanded access to the unconscious
• ✅ A state of accelerated learning
• ✅ A recognised therapeutic tool

To understand how hypnotherapy fits into the broader context of psychological treatments, see our complete guide to psychotherapy.

2. What Is the Difference Between Hypnosis and Hypnotherapy?

Although related, the two concepts are not synonyms.

2.1. The difference

2.2. Who can provide hypnotherapy

Hypnotherapy is appropriately delivered by:

• Licensed psychologists
• Psychiatrists with specific training
• Physicians with relevant clinical training
• Dentists (for use in dentistry)
• Complementary therapists with recognised credentials

⚠️ Caution: “Hypnotherapists” without recognised clinical training pose a risk. Always verify professional credentials.

3. What Happens in the Brain During Hypnosis

Modern neuroscience has documented specific brain changes during hypnotic trance.

3.1. Neurophysiological changes

Research using fMRI (functional magnetic resonance imaging) shows that during hypnosis:

• Prefrontal cortex: increased connectivity (focused attention)
• Anterior cingulate cortex: pain modulation
• Amygdala: reduced emotional reactivity (Hoeft et al., 2012)
• Default mode network: reduced activity (less “mental rumination”)

Citation capsule: Neuroimaging studies show that hypnosis produces measurable changes in brain regions tied to attention, emotional regulation, and pain perception, confirming that it is neither placebo nor theater but a real neurophysiological state.

3.2. Why hypnosis works

Three mechanisms explain its therapeutic efficacy:

1. Reorganizing beliefs: suggestions can update limiting beliefs
2. Accessing emotional memories: processes memories without reactivating trauma
3. Bodily modulation: can reduce pain, anxiety, and physiological responses

3.3. Who is most hypnotizable

Research shows that 60-70% of people are moderately hypnotizable (APA Division 30, 2024). Factors that increase responsiveness:

• The ability to concentrate
• Vivid imagination
• Motivation for the process
• Trust in the therapist

Note: there is no such thing as “not hypnotizable.” Everyone can enter a trance with practice and the right technique.

4. Is Hypnosis Dangerous? Myths and Facts

Hypnosis is surrounded by myths. Let’s clear up the main ones.

4.1. 10 common myths

4.2. Real risks (rare)

• Post-session fatigue (rare)
• Intense emotional reactivation with traumas (manageable with a therapist)
• Mild headache (rare)
• Mild physical symptoms during induction (manageable)

When delivered by a qualified professional, hypnosis is one of the safest therapeutic practices.

5. How Do I Know If I’m Under Hypnosis

The experience of trance varies, but there are characteristic signs.

5.1. Common signs during trance

Physical:

• Deep muscle relaxation
• Slower, deeper breathing
• Reduced heart rate
• A sense of heaviness or lightness in the body

Cognitive:

• Concentrated focus on a single idea or image
• Reduced peripheral attention
• More fluid thinking
• Vivid imagination

Emotional:

• Deep calm
• A sense of safety
• Emotional comfort
• Mild temporal dissociation (losing track of time)

Behavioral:

• Automatic responses to suggestions
• Eyelid catalepsy (heavy eyes)
• Spontaneous movements following suggestions

5.2. Stages of trance

1. Induction (5-10 min): progressive relaxation
2. Deepening (3-5 min): narrowing focus
3. Therapeutic work (20-40 min): suggestions and processing
4. Emergence (5-10 min): gradual return to waking awareness

⚠️ Everyone experiences trance in a unique way. There is no “right or wrong.”

6. Which Conditions Does Hypnosis Have Evidence For?

Hypnotherapy has proven efficacy for a range of conditions.

6.1. Conditions with Level A evidence (strongest)

• Anxiety and anxiety disorders
• Depression (as a complement)
• Chronic pain (fibromyalgia, headache, cancer pain)
• PTSD (Post-Traumatic Stress Disorder)
• Specific phobias
• Irritable bowel syndrome
• Smoking (cessation)
• Insomnia

6.2. Conditions with Level B evidence (moderate)

• Eating disorders (bulimia, anorexia)
• OCD (Obsessive-Compulsive Disorder)
• Asthma
• Hypertension
• Atopic dermatitis
• Athletic performance
• Academic performance
• Pre-surgical anxiety

6.3. Conditions with emerging evidence

• Burnout syndrome
• Emotional dependency
• Conversion disorders
• Sexual dysfunction

For a complete evidence-based list, see Mayo Clinic and [APA].

7. Does Hypnosis Work for Anxiety?

Anxiety is one of the leading indications for hypnotherapy.

7.1. How it works

• Accesses emotional memories below conscious awareness
• Reorganizes automatic thought patterns
• Reduces amygdala reactivity
• Teaches physiological self-regulation

7.2. 7 hypnosis techniques for anxiety

1. Deep breathing with suggestions of calm
2. Safe-place visualization (the inner-refuge technique)
3. Regression to memories of success
4. Belief restructuring (“I am safe,” “I deserve peace”)
5. Systematic desensitization in imagination
6. Self-hypnosis for daily use
7. Resource anchoring (gestures + positive emotions)

7.3. Expected results

In my clinical practice, I observe (data from 2018-2025, n≈180 patients):

• 60-80% reduction in the intensity of anxiety, consistent with the meta-analysis by Alladin & Alibhai (2007) that reported a large effect size (d=1.39) for cognitive-behavioural hypnotherapy
• Results in 6-10 sessions for cases of moderate anxiety
• Improved sleep in 2-3 sessions
• Reduced physical symptoms in 4-5 sessions

Citation capsule: A meta-analysis of 12 randomized studies (n=584) confirmed that cognitive-behavioural hypnotherapy reduces anxiety with a large effect size, comparable to CBT alone (Alladin & Alibhai, 2007).

7.4. Breathing and hypnosis

Combining controlled breathing with hypnotic suggestions is one of the most effective techniques for anxiety attacks. It can be practiced at home with self-hypnosis.

For a complete guide to anxiety, see our Pillar: Anxiety and Depression.

8. Does Hypnosis Help With Depression?

Hypnosis can be a complement to depression treatment.

8.1. How it works

• Accesses deep negative beliefs (“I’m not capable,” “nothing will get better”)
• Reorganizes the internal narrative about the self
• Increases motivation to act
• Complements CBT and medication

8.2. Proven benefits

• 60% of patients report significant improvement, in line with the meta-analysis by Kraft & Kraft (2009) that found a large effect of adjunctive hypnosis in refractory depression
• Complements SSRIs (selective serotonin reuptake inhibitors, a class of antidepressants)
• Particularly useful in trauma-related depression
• Effective in treatment-resistant depression

8.3. Limitations

• ⚠️ It does not replace medication in severe cases
• ⚠️ It does not replace structured psychotherapy
• ⚠️ Depression with suicidal ideation requires a psychiatric approach

8.4. Effective combinations

• Hypnosis + CBT
• Hypnosis + SSRIs
• Hypnosis + mindfulness
• Hypnosis + interpersonal therapy

9. Does Hypnosis Really Reduce Chronic Pain?

This is one of the most robust applications of hypnotherapy.

9.1. Mechanisms

Hypnosis for pain works through:

• Sensory modulation: reduces perceived intensity
• Emotional modulation: reduces the associated suffering
• Cognitive modulation: changes the interpretation of pain
• Autonomic modulation: reduces the stress response

9.2. Conditions treated

• Fibromyalgia
• Tension headache and migraine
• Chronic lower back pain
• Cancer pain
• Arthritis
• Trigeminal neuralgia
• Irritable bowel syndrome

9.3. 5 effective techniques

1. Hand anesthesia: transferring numbness to another part of the body
2. Quality shift: transforming the sensation into another (cold, numbness)
3. Temporal distance: observing the pain as if it were in the past
4. Dissolution: visualizing the pain dissolving
5. Spatial compression: compressing the pain into a smaller space

9.4. Results

• 50-70% reduction in pain intensity (on average), supported by a meta-analysis of 18 studies (n=350 patients) with a standardized mean difference of -0.74 (Montgomery et al., 2000)
• A cumulative effect (multiple sessions amplify the benefit)
• Reduced use of analgesics by up to 40% in cancer patients (Langlois et al., 2022)

Chronic pain and stress form a well-documented vicious cycle. To understand how burnout amplifies physical symptoms, see Burnout: A Complete Guide.

Citation capsule: Hypnosis reduces chronic pain with a moderate to large effect size (d≈0.7), supported by 20+ years of evidence including Montgomery’s classic meta-analysis and recent systematic reviews in cancer pain.

10. Does Hypnosis Treat Emotional Trauma?

Hypnosis has a specific approach for trauma.

10.1. How it works

• Accesses traumatic memories in a safe state
• Processes them without reactivating the original emotional intensity
• Reorganizes the narrative about the event
• Promotes emotional integration

10.2. A 7-step protocol

1. Establishing safety
2. Assessing the history
3. Building inner resources
4. Gradual exposure to the trauma
5. Cognitive restructuring
6. Integrating the event
7. Anchoring new resources

10.3. Approaches used

• EMDR with hypnosis (Shapiro, 2017 — a meta-analysis confirming efficacy for PTSD, with protocols that can be integrated into hypnotherapy)
• Therapeutic regression
• Hypnotic desensitization
• Emotional reprocessing

To understand how traumatic memories and emotional patterns show up clinically, also see our guide to fear of judgment, which covers related triggers.

⚠️ Severe trauma requires a professional with advanced training. Never use self-hypnosis for serious traumas.

Citation capsule: EMDR (Eye Movement Desensitization and Reprocessing) is a Level A evidence-based protocol for PTSD, originally developed by Shapiro (1989), with later systematic reviews supporting its efficacy. Combining it with hypnosis expands autonomic regulation resources.

11. What a Hypnotherapy Session Looks Like

Knowing the process reduces anxiety and improves results.

11.1. Typical structure (50-60 min)

1. Opening conversation (10 min)

• Listening to the concern
• Explaining the process
• Agreeing on goals

2. Induction (10-15 min)

• Progressive relaxation
• Focusing on the voice, the breath, or an image
• Depth tests

3. Therapeutic work (20-30 min)

• Personalized suggestions
• Regression or progression (when indicated)
• Belief restructuring
• Therapeutic visualizations

4. Emergence (5-10 min)

• Counting down
• Gradual return
• Post-session feedback

11.2. How many sessions are needed?

• Simple cases (fear of flying, a habit): 3-5 sessions
• Moderate cases (anxiety, phobias): 6-12 sessions
• Complex cases (depression, trauma): 12-30 sessions
• Self-hypnosis: a complement for daily use

12. How to Choose a Good Hypnotherapist

Essential criteria for a safe practice.

12.1. Technical criteria

• Professional credentials (licensed as a psychologist, physician, or dentist)
• Specific training in hypnotherapy (at least 100 hours)
• Ongoing supervision with a senior professional
• A professional code of ethics

12.2. Personal criteria

• Therapeutic bond: do you trust the professional?
• Active listening: do you feel heard?
• Transparency: do they explain what they are doing?
• Ethics: they do not make unrealistic promises

12.3. Warning signs

• Promises of a definitive “cure” in 1 session
• Requests to reveal secrets
• Pressure to book intensive sessions
• No professional credentials
• Prices far below the market

13. How to Practice Self-Hypnosis at Home?

You can practice basic techniques at home after learning them with a professional.

13.1. Benefits of self-hypnosis

• Daily practice at no cost
• Autonomy in your treatment
• Reinforcement of sessions with a therapist
• A lifelong skill

13.2. A basic exercise (5 min)

1. Sit comfortably
2. Close your eyes and take 3 deep breaths
3. Count from 10 down to 1, deepening the relaxation
4. Repeat a target phrase: “I am calm and at peace”
5. Visualize the desired outcome for 1-2 min
6. Count from 1 to 5 to come out
7. Open your eyes slowly

13.3. When to use it

• Before stressful situations
• To sleep better
• In moments of acute anxiety
• As a daily wellness practice

Self-hypnosis and emotional self-regulation go hand in hand. If you struggle with procrastination or difficulty getting started on tasks, self-hypnosis techniques can complement what we cover in Procrastination: What It Is and How to Overcome It.

14. When to See a Hypnotherapist

Hypnotherapy is indicated when:

• You want faster results than traditional psychotherapy
• You have specific phobias that limit your life
• You suffer from chronic pain without complete relief
• You have persistent anxiety or stress
• You want to quit smoking or break another habit
• You want to improve performance (sports, art, public speaking)
• You have physical symptoms with no clear medical cause

15. FAQ — Frequently Asked Questions

Is hypnosis safe?

Yes, when delivered by a qualified professional. It is one of the safest therapeutic practices.

What if I can’t be hypnotized?

Almost everyone can enter a trance. Only 5-10% show low responsiveness, but even they benefit.

How much does a session cost?

It typically ranges from about £50 to £150 depending on the region and the practitioner. Some teaching clinics charge less.

Does hypnosis replace medication?

Not for severe cases. In mild to moderate cases, it can complement treatment or allow a gradual reduction (always under medical supervision).

Can I do hypnosis online?

Yes. Online hypnotherapy has efficacy comparable to in-person sessions, especially since telehealth became widely established.

Will I remember everything?

Usually yes. Most people remember the whole session, although some natural partial amnesia for specific suggestions can occur.

Does hypnosis work on children?

Yes, children are often more hypnotizable than adults because of their natural capacity for imagination. Adapted protocols are used.

Is it the same thing as stage hypnotism?

No. Stage hypnosis uses entertainment techniques (high suggestibility). Clinical hypnotherapy is structured and ethical.

16. Final Thoughts

Hypnosis is one of the most versatile therapeutic tools available, with robust evidence for dozens of conditions. It is not magic: it is applied neuroscience.

If you have anxiety, chronic pain, phobias, or want to quit smoking, consider hypnotherapy as an option. It is safe, effective, and generally faster than traditional approaches.

Always look for a qualified professional who is well recommended. Your mental health deserves serious care.

About the Author

Fabio Morus is a clinical hypnotherapist with advanced training in clinical hypnosis. He works online and in person, with a focus on anxiety, depression, phobias, and chronic pain.

Contact: https://fabiomorus.com/contato/ Book a session: https://fabiomorus.com/agendar/