Hot water, as a means of conveying heat to the interior of the body, is a stimulant to the stomach, to the great nerve centres back of the stomach, and to the general blood-circulation. Hence the efficacy of drinking a goblet of hot water at regular intervals, as preceding each meal. Like rubbing, mustard-plasters, or other stimulants applied to the outside of the body, such internal excitation may make a powerful and often serviceable alternative impression.

Hot water is now much used by surgeons and obstetricians for the arrest of bleeding, from injured surfaces, from the womb after labor, etc. For this purpose, it should have a temperature of about 1200 Fahr.