Does Hypnosis Work? What the Science Really Says About Hypnosis for Anxiety and Stress

The short answer

Yes — for some conditions, hypnosis works. A 2019 review of studies found people who got hypnosis for anxiety improved more than about 79% of untreated people. Stanford brain scans show hypnosis makes real, measurable changes in the brain. The evidence is strongest for stress before medical procedures and as a helper alongside therapy like CBT. It is weaker as a standalone fix for chronic anxiety or phobias.

Is hypnosis real? What Stanford brain scans found

This is the first question most people ask. It is a fair one. Hypnosis has a long history of stage shows and movie tricks. So is it a real thing your brain does, or just play-acting?

The brain evidence says it is real.

In 2017, a Stanford team led by Dr. David Spiegel scanned the brains of 57 people using fMRI. That is a machine that shows which parts of the brain are active. The researchers compared people who are easy to hypnotize with people who are not. During hypnosis, the easy-to-hypnotize group showed three clear changes:

• Less activity in a worry-and-alarm region (the dorsal anterior cingulate cortex). This is part of the brain's "what should I focus on" system. Quieting it fits the deep focus people feel in hypnosis.


• A stronger link between a control region and a body-sense region (the prefrontal cortex and the insula). This helps explain how the mind can change how the body feels.


• A weaker link to the mind-wandering network. This matches the absorbed, less self-conscious state people describe.

You can read the Stanford write-up of the study here.

The plain takeaway: hypnosis is a real, focused state of attention with its own brain fingerprint. It is not mind control. You stay aware. You stay in control. More on that below.

Does hypnosis work for anxiety?

Here is the most honest answer the science allows: yes, but mostly as a helper.

The best single study to look at is a 2019 meta-analysis. A meta-analysis pools many smaller studies into one bigger picture. This one combined 15 studies and 17 trials of hypnosis for anxiety.

The results were encouraging. Right after treatment, the average person who got hypnosis was less anxious than about 79% of people who got no treatment. At the longest follow-up, that number rose to about 84%. In research terms, those are medium-to-large effects.

But the study added one caveat that matters a lot:

Hypnosis worked better at reducing anxiety when it was combined with other therapy than when it was used on its own.

In other words, hypnosis is a strong teammate, not usually a solo act. You can read the 2019 anxiety meta-analysis abstract here.

This is why the type of anxiety you have matters so much. The next section breaks that down.

Generalized anxiety vs. phobias vs. acute stress: where does hypnosis help most?

Not all anxiety is the same, and hypnosis does not treat it all equally. This is the honest breakdown most websites skip.

A quick note on phobias. Hypnosis can help, but the research mostly shows it working as an add-on to exposure therapy — slowly facing the thing you fear with support. Reviews of the evidence say there is not enough proof to call hypnosis a standalone cure for phobias, chronic anxiety, or PTSD. We say that plainly because pretending otherwise would not help you.

If you want a deeper look at how these approaches compare, see our guides on hypnotherapy vs. CBT and hypnosis vs. EMDR.

Can hypnosis help with stress?

For short-term, situational stress, this is where hypnosis shines brightest.

A 2024 umbrella review looked at 49 separate meta-analyses, covering 261 studies. An umbrella review is a study of studies of studies — about as high-level as evidence gets. It found the most robust results for hypnosis in two areas: medical procedures and pain. That means stress before surgery, dental work, or a scary medical test is exactly where the evidence is strongest. You can read the 2024 umbrella review here.

There is a second strong example worth knowing: gut-directed hypnotherapy for irritable bowel syndrome (IBS). IBS is closely tied to stress and anxiety. Hypnosis for it has such solid evidence that major gastroenterology guidelines list it as a recognized second-line option. A 2025 review found all 12 studies it looked at favored the treatment.

For everyday stress — work pressure, racing thoughts, trouble winding down — many people find hypnosis and self-hypnosis genuinely calming. The formal evidence there is thinner than for procedures, but the safety is high and the downside is low.

What is the "success rate" of hypnotherapy?

You may have seen a "93% success rate after 6 sessions" claim on hypnosis websites. Be careful with it.

That figure traces back to a 1970 literature review, not a modern controlled trial. It gets copied around the internet as if it were current fact. It is not. We will not repeat it as a real success rate, and you should be skeptical of any site that does.

Honestly, "success rate" is the wrong question anyway. Success depends on the condition, the person, the practitioner, and whether hypnosis is used alone or with other therapy. A single percentage hides all of that.

There is also a humbling fact buried in that 2024 umbrella review. Of the 49 meta-analyses it examined, only 9 were rated high quality. The research is promising, but plenty of it is still rough. We would rather tell you that than sell you a clean number that doesn't exist.

Can everyone be hypnotized?

No — and that is normal. People differ in how easily they enter hypnosis, and it is a fairly stable trait.

The most cited estimate, from Stanford's Dr. Spiegel, splits adults roughly into thirds: about 20% are highly hypnotizable, about 50% moderately so, and about 30% are not very responsive. (Some scales using stricter cutoffs put the "highly responsive" group closer to 10–15%.)

Spiegel has compared how stable this trait is to IQ. The good news: most people fall somewhere in the responsive middle. You do not need to be in the top group to benefit. A skilled practitioner adjusts the approach to fit you.

What does hypnosis feel like, and is it safe?

Most people describe hypnosis as deep relaxation with focused attention — a bit like being absorbed in a good book or a movie. You hear everything. You can stop at any time. You will not get "stuck."

On safety, the Cleveland Clinic describes hypnotherapy as a safe, low-risk way to manage symptoms. The most common side effects are mild and short-lived: headache, dizziness, or a little drowsiness or anxiety. You cannot be made to act against your values.

A few people should check with a doctor first. That includes anyone with a severe dissociative disorder, poorly controlled epilepsy, or a history of psychosis. For more, see our guide on whether hypnosis is safe.

One rule holds across the board: hypnosis is a complement to professional mental-health care, not a replacement for it. If you are struggling with anxiety, keep your doctor or therapist in the loop.

How to try hypnotherapy for anxiety or stress

If you want to give it a fair shot, a few things make a real difference.

• Look for proper certification. A trained, credentialed practitioner matters more than fancy claims on a website. See our guide on how to find a hypnotist.


• Ask about their approach. Many of the best results come from hypnosis combined with therapy like CBT. Ask whether they work that way.


• Know what the first session looks like. Our guide on what happens in a first hypnotherapy session walks you through it, and how many sessions you might need sets expectations.


• Consider cost up front. See how much hypnosis costs so there are no surprises.

Self-hypnosis apps and recordings can help with everyday stress between sessions. For an anxiety condition, working with a qualified person tends to go further.

Find a certified hypnotherapist near you

Hypnotherapy works best with a qualified, certified practitioner — and the right fit for you. Browse certified hypnotherapists in our free directory. You can compare specialties, credentials, and approach before you reach out — no pressure, no cost to look.

Searching in a major city? Start with New York, Los Angeles, or Chicago.

Frequently asked questions

Does hypnosis really work for anxiety?

Yes, for many people — but it works best as a helper. A 2019 meta-analysis found people who got hypnosis for anxiety improved more than about 79% of untreated people. The same study stressed that hypnosis worked better when combined with other therapy than when used alone.

Is hypnosis real or just a placebo?

Hypnosis is real. A 2017 Stanford fMRI study found distinct, measurable brain changes during hypnosis — quieter activity in an alarm region and altered connections in attention and body-sense networks. These changes appear in highly hypnotizable people and are hard to explain by placebo alone.

How does hypnosis affect the brain?

During hypnosis, brain scans show three main shifts: less activity in a region tied to self-conscious worry, a stronger link between a control region and a body-sense region, and a weaker link to the mind-wandering network. Together these match the focused, absorbed state people feel.

What's the success rate of hypnotherapy?

There is no single, trustworthy success-rate number. The viral "93%" figure comes from a 1970 review, not a modern trial, so ignore it. Results depend on the condition, the person, and whether hypnosis is paired with other therapy. Evidence is strongest for procedural stress, pain, and IBS.

Can you be hypnotized against your will?

No. You cannot be hypnotized against your will or made to act against your values. You stay aware and in control the whole time, and you can stop whenever you want. Hypnosis is focused attention and deep relaxation, not mind control.

How many hypnotherapy sessions does anxiety take?

It varies by person and condition, and there is no fixed number. Many people work through a short series of sessions rather than a single visit, often alongside other therapy. A certified practitioner can give you a realistic plan after a first session. See our guide on how many sessions to expect.

Is hypnotherapy safe? What are the side effects?

Hypnotherapy is considered safe and low-risk for most people. The most common side effects are mild and brief: headache, dizziness, or slight drowsiness or anxiety. People with severe dissociative disorders, poorly controlled epilepsy, or a history of psychosis should talk to a doctor first.

Can everyone be hypnotized?

Not equally. About 20% of adults are highly hypnotizable, around 50% are moderately responsive, and roughly 30% respond little — and this trait is fairly stable. You do not need to be highly hypnotizable to benefit. A skilled practitioner adjusts the approach to fit how you respond.