Forty-seven subjects with known skin sensitivity to pollen and/or house-dust were divided into five groups and tested with four strengths of allergen.
The prick-test method was employed.
In the first part of the investigation a group of “unhypnotized” subjects were compared with a group who had suggestions made under hypnosis that their skin reactions to the allergen would not occur when tested a second time. A significant diminution in the size of the weal was obtained in the hypnosis group at the lower two strengths of allergen.
In the second part of the investigation the subjects were divided into three groups. All were hypnotized, no suggestions regarding skin reactions were given to one group, the second group were given suggestions that only on one arm would the skin reactions be less or not recur, and in the third group the suggestion was made about the reactions on both arms.
There was found to be a similar decrease in the response to prick-tests after hypnosis in all three groups.
Fry L. Mason AA Pearson RS. Effect of hypnosis on allergic skin responses in asthma and hayfever. BMJ 1964:114S.1 148.