3 Things Hypnosis Cannot Do (and What It Can)

Updated 2026-11-08

The 3 things hypnosis cannot do are make you act against your will, recover accurate memories on demand, and cure illness on its own. Those are the limits the research actually supports, even though the blogs that rank for “3 things hypnosis cannot do” can’t agree on a list.

Here they are in one sentence each:

1. It can’t make you act against your will or values. You keep voluntary control and can refuse a suggestion.
2. It can’t recover accurate memories. It tends to make people more confident in what they recall, not more correct.
3. It can’t cure illness on its own. It has real evidence as an add-on in some areas, and weak or mixed evidence in others.

The rest of this page shows the evidence for each, the other things people expect from hypnosis, and what it can genuinely do.

1. Make you act against your will or values

The stage-show version of hypnosis, where someone is switched into a puppet, is the most persistent myth. It is also the one research has looked at most directly.

In a 2020 review of hypnosis myths, psychologists Steven Jay Lynn, Irving Kirsch and colleagues tested the claim that people can’t resist hypnotic suggestions. They cite an experiment where participants were told they could be deeply absorbed in suggestions and still resist them. Those participants did not respond to 95% of the suggestions. Other studies they review found people could directly oppose suggestions. How much control people feel during hypnosis tracks what they expected going in, not some trance switch.

That matches what public health sources say. The Victorian government’s Better Health Channel puts it plainly: you can’t be hypnotized into doing things against your will, you can’t be forced into a hypnotic state, and suggestions are taken on board only if they are acceptable to you. A 2023 summary of the research from Binghamton University adds that people can resist and even oppose hypnotic suggestions.

The honest caveat is that compliance is real. The same 2020 review notes that compliance figures into some responses. People sometimes go along with a request because of the social setting, the same way they might in any room with an authority figure. That is ordinary social pressure, not hypnosis overriding your values, and you can say no to it. If the “loss of control” worry is what’s stopping you, our page on whether hypnosis is safe covers the real risks.

2. Recover accurate memories

This is the limit with the most practical consequences. Researchers flag serious implications in therapy and legal cases when hypnosis creates memories instead of recovering them.

The pattern in the research is consistent: hypnosis can bring up more material, but more of it is wrong, and people trust it more. Lynn and colleagues summarize it this way: hypnosis can produce increases in accurate memories, but it also produces increases in inaccurate memories. In 23 studies one review covered, hypnotized people either felt more confident in their recollections than non-hypnotized people, or felt confident in memories of events they had previously denied. Their bottom line: hypnosis is not a reliable way to improve recall.

The confidence problem is what makes it risky. A 2025 review in Frontiers in Psychology notes that hypnotic suggestions can inflate the person’s confidence in the accuracy of their own (false) memories, and concludes that hypnotic regression and guided imagery should be used with caution because they may lead to false memory recall. The Better Health Channel also lists false memories among the possible side effects of hypnosis.

US courts have noticed. According to the 2020 review, courts in 27 states have barred hypnotically refreshed testimony over concerns about false memories and unwarranted confidence.

Age regression fares no better. When researchers checked “past life” memories against facts from the period, the details were almost invariably incorrect and mostly matched what the experimenters had told participants about their supposed past identities. What comes back reflects expectations and imagination, not a recording.

3. Cure illness on its own

Hypnosis has a better evidence base than its skeptics assume, and a much narrower one than its marketers claim.

The largest recent look at the evidence is a 2024 umbrella review in Frontiers in Psychology by Rosendahl and colleagues. It pooled 49 meta-analyses covering 261 distinct primary studies from the previous 20 years. The biggest effects showed up for pain, medical procedures, and children and adolescents. But only nine of the 49 meta-analyses were rated high quality, and the evidence comparing hypnosis directly with other established treatments was sparse.

Results also vary by condition. The 2020 myths review reports favorable meta-analyses for some problems but mixed results for insomnia, with no significant difference from sham interventions, and it adds that not everyone improves with hypnosis treatment.

And in practice, it is rarely used alone. The same review quotes researchers noting that few practitioners view hypnosis as a stand-alone therapy; it is more commonly used alongside other treatments. The Better Health Channel says the same: hypnosis is not a treatment in its own right but part of medical, psychological and dental care. If you have a health condition, hypnosis is something to discuss with your doctor, not a replacement for them.

Other things people expect from hypnosis

The three limits above are the big ones. A few smaller expectations also don’t survive contact with the research.

Instant change

Some people see hypnosis as a quick fix for long-standing problems. The 2020 review lists that panacea view as a myth, alongside the opposite myth that hypnosis is useless. Neither matches the findings. Think of it as practice that adds up, not a switch.

Working without your participation

Hypnosis is something you do, not something done to you. You can’t be forced into a hypnotic state, and the 2020 review notes that negative beliefs about hypnosis suppress how well people respond. Your attitude and effort are part of the mechanism.

Working the same on everyone

People differ a lot. By the conventional split, approximately 15 to 20 percent of people are highly suggestible, another 15 to 20 percent low, and the rest somewhere in the middle. The encouraging part for anyone learning it as a skill: in training studies reviewed by Lynn and colleagues, between 25 and 50 percent of initially low-suggestible people tested as high-suggestible after the program. The review also calls the idea that results depend on a gifted hypnotist a myth.

What hypnosis can do

With the limits in place, here is the realistic picture.

• Pain and medical procedures. These are where the umbrella review found the largest effects.
• Add to other approaches. One meta-analysis cited in the 2020 review found clients receiving CBT plus hypnosis improved more than at least 70% of clients receiving the same CBT without it. The review also points to meta-analyses showing benefits from combining hypnosis with CBT for weight loss compared with CBT alone. We look at that evidence closely in does hypnosis work for weight loss.
• Change how suggestions feel. Responses to suggestion aren’t just faking: the 2020 review cites neuroimaging showing suggestions activate brain regions consistent with the suggested experience.
• Be learned. Responsiveness is not fixed, and you don’t need a special hypnotist to get started. If you want to build it as a skill, try self-hypnosis with our step-by-step guide.

Where the “3 things hypnosis cannot do” list comes from

There is no official list. The pages that rank for the phrase are mostly hypnotherapy practice blogs and directories, and each picks its own three: control your mind, retrieve accurate memories, cure illness, change you without your participation, replace your values, or guarantee results.

Most of those are fair points, but they are usually asserted without sources and mixed with marketing. Read against the research, they collapse into the three limits above. “Control your mind” and “replace your values” are the same claim about will. “Retrieve accurate memories” stands on its own. “Cure illness” and “guarantee results” are both about what hypnosis can achieve as a treatment. “Change you without participation” belongs with the smaller expectations, because hypnosis needs your cooperation to work at all.

So if you’ve seen a different three on another site, you haven’t been misled exactly. You’ve seen a slice of the same picture, minus the evidence.