Abstract: The author presents her experience investigating the incidence of post-anaesthetic shaking in the recovery room ward, and develops a clinical tool for its treatment. Several theories about post-anaesthetic shaking are examined. The cases of 1296 patients who had major regional or general anaesthetics over four consecutive months in the previous year are studied. The incidence of post-anaesthetic shaking and correlating core body temperature readings with post-anaesthetic shaking are examined. A protocol for reducing/treating post-anaesthetic shaking is developed on the basis of the findings of the study.