Abstract
The effects of psychosocial events on the natural history of warts and the physiological mechanisms that mediate them are observed in two case studies. Psychosocial factors not only accelerate the remission of warts but may also reinforce their presence and proliferation as in Case No. 1. Vasomotor changes during and following nonspecific hypnotic suggestions in Case No. 2 lend confirmation to earlier speculations and hypotheses on the nature of one mediating physiological mechanism in wart remission. The merits of an operant conditioning paradigm of so called “hypnotic” behaviors were discussed.

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