Inclusion Criteria:  Patients 18 years of age or older Undergoing a screening colonoscopy (mass screening Fecal Immunochemical Test positive or as an individual (family history of colon cancer or adenoma, personal history of adenoma, cancer, chronic inflammatory bowel disease) or in the context of a transit disorder, hemorrhage or anemia Affiliated with a French social security system Having signed a written consent  Exclusion Criteria:  Patient requiring emergency colonoscopy History of colonic resection Carriers of behavioral disorders and/or psychiatric illness Limited cognitive abilities making it impossible to read or fill out a discrete choice questionnaire (language problems, comprehension problems) Contraindication to hypnosis, preventing quality interaction (comprehension and/or language problems, hearing impairment) Contraindication to general anesthesia Under a legal protection regime Pregnant or breastfeeding woman