2224 



DYSIDROSES AND DYSTROPHIES 



also in the boots. If there are excoriations, formahn should not 

 be used, but instead hydrogen peroxide (lo per cent.) or potassium 

 permanganate (i in 4,000), followed by boric powder or a dermatol, 

 xeroform, or tannoform powder (3i. of any of these drugs to §i. of 

 talci). Internal trealment is not of much use, but sulphur (gr. iii.) 

 three times daily may be tried. One of us had good results in a 

 case by the a.dministration of urotropin, gr. x., thrice daily. 



Chromidrosis. 



The term is applied to coloured excretion of sweat or sebum. The condi- 

 tion affects in most cases the armpits, but cases have been described affecting 

 the face, chest, abdomen, inguinal regions, hands, and feet. The colour has 

 been described as black, blue, red, green, yellow, and violet. We have per- 

 sonally observed only two cases of chromidrosis. In both the axillary regions 

 were affected, the colour was brick-red, and the sweat stained the clothes red. 

 In one of the cases it was due to B. prodigiosus, in the other to a red pigment- 

 producing coccus. 



Phosphoridrosis. 

 Synonym, — Phosphorescent sweat. 



This condition has been described by Kostor and others, but is very rare. 

 In one case it was stated that it appeared after eating phosphorescent fish. 

 According to Beyerink the phosphorescence is due to photo-bacteria. 



Uridrosis. 



Small white crystals, forming a sort of hoar-frost, are present on the skin, 

 due to excretion by the skin of urinary constituents, especially urea and 

 chlorides. Nash records several cases of a whitish deposit on the skin in 

 native children and natives, which, according to some authorities, may have 

 been the same condition. 



Hsematidrosis. 



Several cases of hyperidrosis with red blood cells and leucocytes in the 

 sweat have been placed on record. 



Anidrosis. 



Idiopathic total anidrosis, or absence of sweat, is exceedingly rare, but a 

 diminution in the secretion of sweat is often observed. There are people in 

 whom the bringing about of perspiration by hot-air baths and drugs is very 

 difficult. 



Symptomatic anidrosis is present in leprotic patches, and may be of diag- 

 nostic value. It is seen also in sclerodermia, general or circumscribed 

 (morphaea), and in xerodermia. The secretion of sweat may be much de- 

 creased in diabetes and certain nervous conditions. 



DYSIDROSES. 

 Prickly Heat. 



Synonyms. — Lichen Tropicus, Sudamina Papulosa, Miharia 

 Rubra, Miliaria Papulosa, SalpuUido (Cuba), Calor Picante (Minorca), 

 Humon El-Nil (Arabic). 



Definition. — Prickly heat is a papular or papulo-vesicular erup- 

 tion, with marked pruritus, and associated with profuse sweating. 



Geographical Distribution.— The condition is found all over th 

 tropics and subtropics. It may be observed also in temperat 

 zones during the hot seaFon, especially at sea-bathing places. [, 



