THE CLINICAL importance of disturbances in sweating is being more and more widely recognized. It has become apparent that the sequelae of such disturbances are responsible for a variety of cutaneous and systemic disorders.1 The object of this paper is to review briefly some of the available therapeutic measures in relation to the following three categories2 of sweat disturbances: Hypohidrosis or anhidrosis Hyperhidrosis Dyshidrosis3 or pathidrosis, i. e., abnormal composition of the sweat, or conditions in which both preceding quantitative disturbances are combined or in which one of the two quantitative disturbances coincides with some other disorder or disorders. I. THERAPEUTIC MEASURES IN HYPOHIDROSIS OR ANHIDROSIS Whether the hypohidrosis is functional or due to structural changes in the sweat organ, general measures, such as reduced fluid-intake, rest, and protection from environmental heat and high relative humidity, are likely to prove useful. Unfortunately,