Ergot, belladonna, gallic acid, mineral acids, and tonics. Constitutional treatment is rarely of benefit in the local forms of hyperidrosis, and external applications are seldom of service in general hyperidrosis. Precipitated sulphur, a teaspoonful twice daily, is also well spoken of, combined, if necessary, with an astringent. #What external remedies are employed in the local forms?# Astringent lotions of zinc sulphate, tannin and alum, applied several times daily, with or without the supplementary use of dusting-powders. Weak solutions of formaldehyde, one to one hundred, are sometimes of value. Dusting-powders of boric acid and zinc oxide, to which may be added from ten to thirty grains of salicylic acid to the ounce, to be used freely and often:-- [Rx] Pulv. ac. salicylici ................. gr. x-xxx. Pulv. ac. borici ..................... [dram]v. Pulv. zinci oxidi .................... [dram]iij M. Diachylon ointment, and an ointment containing a drachm of tannin to the ounce; more especially applicable in hyperidrosis of the feet. The parts are first thoroughly washed, rubbed dry with towels and dusting-powder, and the ointment applied on strips of muslin or lint and bound on; the dressing is renewed twice daily, the parts each time being rubbed dry with soft towels and dusting-powder, and the treatment continued for ten days to two weeks, after which the dusting-powder is to be used alone for several weeks. No water is to be used after the first washing until the ointment is discontinued. One such course will occasionally suffice, but not infrequently a repetition is necessary. Faradization and galvanization are sometimes serviceable. Repeated mild exposures to the Roentgen rays have a favorable influence in some instances. #Sudamen.# (_Synonym:_ Miliaria crystallina.) #What is sudamen?# Sudamen is a non-inflammatory disorder of the sweat-glands, characterized by pin-point to pin-head-sized, discrete but thickly-set, superficial, translucent whitish vesicles. #Describe the clinical characters.# The lesions develop rapidly and in great numbers, either irregularly or in crops, and are usually to be seen as discrete, closely-crowded, whitish, or pearl-colored minute elevations, occurring most abundantly upon the trunk. In appearance they resemble minute dew-drops. They are non-inflammatory, without areola, never become purulent, and evince no tendency to rupture, the fluid disappearing by absorption, and the epidermal covering by desquamation. #Give the course and duration of sudamen.# New crops may appear as the older lesions are disappearing, and the affection persist for some time, or, on the other hand, the whole process may come to an end in several days or a week. In short, the course and duration depend upon the subsidence or persistence of the cause. #What is the anatomical seat of sudamen?#