Question explored with the scientific record
Conversation so far
- 1 Has photobiomodulation effect on human stemcells in vivo?
- 2 Has photobiomodulation positive effects on humans?
- 3 Which conditions show the strongest benefit over sham/placebo?
- 4 Has hypnosis positive effects on humans?
Answered on this page ↓
Has hypnosis positive effects on humans?
The short version: hypnosis does produce real, measurable effects in people, but the strongest evidence is for pain and anxiety, and most of it is small or uncontrolled.
The best-controlled human data here are on pain. A randomized pilot found hypnosis cut experimental pain intensity from 68.5 to 48.1 and unpleasantness from 70.4 to 47.6, with no change in cortisol or inflammatory markers [6]. In spinal-cord injury, self-hypnosis lowered pain and raised perceived control versus biofeedback [4]. In multiple sclerosis, self-hypnosis dropped pain from 6.5 to 3.7 during treatment, but the gain faded by four weeks [5]. Brain imaging shows hypnosis and placebo ease pain through overlapping expectation circuits, so some of that benefit is expectancy, not a unique state [3].
| Outcome | Result | Design |
|---|---|---|
| Burn pain (children) | Not significant, p=0.12 | RCT [1] |
| Burn anxiety | -0.8, p=0.03 | RCT [1] |
| Burn heart rate | -15.2 bpm, p=0.01 | RCT [1] |
| MS pain, 4 weeks later | Rebounded to 4.9 | Controlled [5] |
The anxiety and respiratory claims rest mostly on case series, not trials. A review of pediatric respiratory hypnosis found only one small controlled asthma trial, with no difference on lung function, and the rest case series [2]. The burn RCT is the cleanest test, and it moved anxiety and heart rate but not self-reported pain [1].
My call: hypnosis has genuine short-term effects on pain and anxiety, best supported for procedural distress, but the sham-controlled evidence is thin and the benefit fades without practice. Confidence: moderate.
Sources used 6
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Efficacy of hypnosis on pain, wound-healing, anxiety, and stress in children with acute burn injuries: a randomized controlled trial
This randomized controlled trial investigates the efficacy of hypnosis in reducing pain, anxiety, and stress, and improving wound healing in children with acute burn injuries during dressing changes.
DOI: 10.1097/j.pain.0000000000001276 -
Hypnosis in Paediatric Respiratory Medicine
Evidence from mostly case series and one small randomized trial supports hypnotherapy as an adjunct or primary treatment in paediatric respiratory medicine, but the field lacks well-designed randomized controlled trials.
DOI: 10.1016/j.prrv.2013.09.002 -
Neural circuitry underlying pain modulation: expectation, hypnosis, placebo
A perspective integrating functional neuroimaging findings to differentiate neural circuits that mediate certain (certainty) versus uncertain (anxiety) expectations of pain, and to explain how hypnosis and placebo modulate pain via these pathways, with implications for pain trea…
DOI: 10.1016/s1364-6613(03)00061-5 -
Effects of Self-Hypnosis Training and EMG Biofeedback Relaxation Training on Chronic Pain in Persons with Spinal-Cord Injury
This study investigates the effects of self-hypnosis training and EMG biofeedback relaxation training on chronic pain management in individuals with spinal cord injury, finding that self-hypnosis led to significant reductions in pain intensity and increased perceived control ove…
DOI: 10.1080/00207140902881007 -
Efficacy of Self-Hypnosis in Pain Management in Female Patients with Multiple Sclerosis
This study evaluated the efficacy of self-hypnosis for pain management in female patients with multiple sclerosis, finding that while it significantly reduced pain intensity during the intervention, the effects were not maintained after four weeks.
DOI: 10.1080/00207144.2017.1246878 -
Experimental Pain Ratings and Reactivity of Cortisol and Soluble Tumor Necrosis Factor-α Receptor II Following a Trial of Hypnosis: Results of a Randomized Controlled Pilot Study
This randomized controlled pilot study investigates the effects of hypnosis on pain ratings and physiological responses, revealing significant reductions in pain intensity and unpleasantness but no significant changes in cortisol or soluble tumor necrosis factor-a receptor II re…
DOI: 10.1111/j.1526-4637.2011.01293.x