Dr Kellogg says...
Hot or Cold?
Often the patient's feeling are a good guide as to whether heat or cold should be applied. The organic intuitions of the body are marvelously correct guides in the application of rational and physiological measures. It is a common thing to hear a patient say, when a correct hydriatic prescription is made, "That will do me good, I am sure." And it does. Nature is a wise teacher and a watchful nurse. p 786