Hypnotherapy

What it is

Gut-directed hypnotherapy is a talking therapy in which a trained therapist (or a structured audio or app programme) guides relaxation, calming imagery and gut-focused suggestions [1][2]. In trials it was delivered individually, in groups, by nurses, or through apps and daily digital programmes [3][4][5]. Typical courses ran for about 6 to 12 sessions over 6 to 12 weeks, while digital courses ran daily for up to 12 weeks or 42 sessions [3][4][2][5].

What the research says

A 2025 systematic review pooled 12 studies with 1,158 people with IBS [1]. All 12 studies favoured gut-directed hypnotherapy, with nine statistically significant [1]. Pooled global symptoms showed a standardised mean difference of 0.73 with a wide confidence interval crossing zero (-0.09 to 1.55; I2 93%), while pain improved with a standardised mean difference of 0.25 (95% CI 0.01 to 0.49; I2 17%) [1]. Subgroups with high-volume delivery and group delivery showed statistically significant global symptom improvement [1].

Network reviews point the same way [6][7]. A 2020 review of 41 trials (4,072 people) found a relative risk of remaining symptomatic of 0.67 (95% CI 0.49 to 0.91) for gut-directed hypnotherapy [6]. A 2025 review of 67 trials (7,441 people), including 12 hypnotherapy trials with 1,507 people, found a relative risk of 0.79 (95% CI 0.66 to 0.95) versus waiting list [7]. Both reviews found no trial at low risk of bias in every domain and funnel-plot asymmetry suggesting overestimated effects [6][7]. A 2024 pain-focused review of 42 trials (5,220 people) found face-to-face gut-directed hypnotherapy reduced the risk of pain not improving (relative risk 0.77, 95% CI 0.61 to 0.96) [8].

Individual trials show durable and practical effects [3][4][9]. In IMAGINE (354 people), six sessions of individual or group hypnotherapy beat supportive talks at 3 months (40.8% and 33.2% versus 16.7% adequate relief) and at 12 months (40.8% and 49.5% versus 22.6%), with group care non-inferior to individual care [3]. In 119 people, nurse-delivered individual and group hypnotherapy each lowered symptom scores over 12 weeks, with 69% versus 57% reaching a 50-point symptom drop [4]. Of 289 treated people followed for two years, 61.8% still met that responder definition at two years [9]. Digital trials in 378 and 240 people found app-based gut-directed hypnotherapy improved pain, stool symptoms, symptom scores and quality of life, beating an active control clearly in one trial and matching muscle relaxation on the prespecified post-treatment pain endpoint in the other [2][5]. Hypnotherapy matched a low FODMAP diet for gut symptoms at six weeks in a 74-person trial, with better anxiety and depression scores [10].

Doses used in studies

IMAGINE used six sessions of individual or group hypnotherapy [3]. A Swedish trial used eight nurse-delivered sessions over 12 weeks, individually or in groups [4]. Digital trials used 12 weeks of app access or a 42-session daily digital programme [2][5]. A diet-comparison trial gave hypnotherapy alongside six weeks of follow-up and reassessed at six months [10]. These are study doses, not recommendations.

Safety and interactions

No serious treatment-related side effects were reported in the trials reviewed here [2][3]. In a 362-person digital trial, no one had a serious adverse event or stopped treatment because of one [2]. In the IMAGINE trial, eight unexpected serious events (mostly cancer or inflammatory bowel disease diagnoses) were judged unrelated to therapy [3]. No upper limit or toxic dose applies to a talking therapy, and none was reported [3][2]. No medicine interactions were reported in these trials [2][3]. No pregnancy or breastfeeding safety data were reported in these trials [2][3]. These trials enrolled people with diagnosed IBS, so new, worsening or unexplained gut symptoms should be reviewed by a clinician before starting hypnotherapy [3].

Caveats and open questions

Blinding is not possible because people know whether they received hypnotherapy, and reviewers rated bias risk as high with signs of publication bias [6][7]. Results varied widely between studies, so the overall pooled symptom estimate was uncertain even though most individual studies favoured hypnotherapy [1]. Digital-versus-active-control results depended on the time window in one trial [2]. Most data are in adults referred from primary or secondary care, with less direct evidence in children and in people with other gut conditions [3][7].