#Chromidrosis.# #Describe chromidrosis.# This is a functional disorder of the sweat-glands characterized by a secretion variously colored, and usually increased in quantity. It is, as a rule, limited to a circumscribed area. The most common color is red. The condition is probably of neurotic origin and tends to recur. (True chromidrosis is extremely rare; most of the cases formerly thought to be such are now known to be examples of pseudochromidrosis.) Treatment should be invigorating and tonic, with special reference toward the nervous system. The various methods of local electrization should also be resorted to. Mild antiseptic and astringent lotions or dusting powders should also be advised. _Red chromidrosis_ or _Pseudochromidrosis_ is a condition in which the coloring of the sweat occurs after its excretion and is due to the presence of chromatogenous bacteria which are found attached to the hairs of the part in agglutinated masses. The axilla is the favorite site. Treatment consists of frequent soap-and-water washings, and the application of boric acid, resorcin, and corrosive sublimate lotions. #Uridrosis.# #Describe uridrosis.# Uridrosis is a rare condition in which the sweat secretion contains the elements of the urine, especially urea. In marked cases the salt may be noticeable upon the skin as a colorless or whitish crystalline deposit. In most instances it has been preceded or accompanied by partial or complete suppression of the renal functions. #Phosphoridrosis.# #Describe phosphoridrosis.# Phosphoridrosis is a rare condition, in which the sweat is phosphorescent. It has been observed in the later stages of phthisis, in miliaria, and in those who have eaten of putrid fish. #Seborrh[oe]a (Eczema Seborrhoicum).# _Synonyms:_ (Steatorrh[oe]a; Acne sebacea; Ichthyosis sebacea; Dandruff.) #What is seborrh[oe]a?# Seborrh[oe]a is a disease of the sebaceous glands, characterized by an excessive and abnormal secretion of sebaceous matter, appearing on the skin as an oily coating, crusts, or scales. In many cases the sweat-glands are likewise implicated, and the process may also be distinctly, although usually mildly, inflammatory. #At what age is seborrh[oe]a usually observed?# Between fifteen and forty. It may, however, occur at any age. #Name the parts most commonly affected.# The scalp, face, and (less frequently) the sternal and interscapular regions of the trunk. It is sometimes seen on other parts. #What varieties of seborrh[oe]a are encountered?# Seborrh[oe]a oleosa and seborrh[oe]a sicca; not infrequently the disease is of a mixed type. #What are the symptoms of seborrh[oe]a oleosa?#