830 Syinptonis. Diayuosis. Trealuieiit. Excessive Sweating. 



poiut of infeetiou, in trembles oeueraUy in the liind (|narters, in dourine at 

 times in tlie region supplied ))y certain nerves, in combined tail and sphincter paraly- 

 sis at the root of the tail. It arises usually as the result of a disease of the 

 sensory nerves. 



Symptoms. Itching- occurs either in paroxysms or con- 

 tinuously, and causes the animal to gnaw, lick, ruh or chafe the 

 affected pnvt of the body, so that sometimes sores develop on 

 the skin. 



Diagnosis. Skin diseases due to anatomical changes and 

 especially scab must be differentiated. It must, however, not 

 be forgotten that in consequence of rubbing, etc., changes may 

 eventually be produced in the skin even in pruritus. As far 

 as possible one should determine whether the trouble is due to 

 some organic disease. 



Treatment. Applications, with friction, of cold water, of 

 alcohol with 1 to 3% salicylic acid, carbolic acid, thymol, cam- 

 phor, naphthol or tar are indicated, also compresses soaked in 

 hot water or alcohol (Schindelka). Eberhardt saw^ good re- 

 sults from applying sulphuric ether while Schindelka records 

 onl}^ temporary improvement wath this and also with sapolan 

 (together with lead water, aa). In other cases anesthetizing 

 drugs give transient or permanent results. Some of those used 

 successfully were an ointment of two parts of cocaine, 5 parts of 

 borax, and 200 parts of lanoline; the application of a powder 

 composed of 3 parts of orthoform and 100 parts of d;sanal on, the 

 skin previously cleansed wdtli warm creolin solution and cotton 

 soaked in benzine; also anesthesin in the form of a 10% oint- 

 ment. 



Literature. Frohner, Monh., 1903, XIV, 459; ,Pr. Mil. A^b., 1901, 162.— 

 Schindelka, Hautkrankheiten, 1908, 6.S.— Schlesin^er, O. M., 1908, 391.— Strebel, 

 Schw. A., 1889, XXXI, 12.5. 



2. Excessive Sweating. Hyperidrosis. 



(Epidrosis, Dysidrosls.) 



Excessive sweating denotes a functional disturbance of 

 the sudoriferous glands, in consequence of which, without any 

 external cause or in certain internal diseases, the whole surface 

 of the body or the greater portion of it (hyperidrosis univer- 

 salis), or only some portions of the body appear continuously 

 wet. 



Etiology. General hyperidrosis usually develops as a sec- 

 ondary affection. It is seen when carbonic acid accumulates 

 in the blood as a result of certain diseases of the respiratory 

 or circulatory organs, in collapse, in the quick decline of fever 

 (socalled critical perspiration), in the course of uremia, in 

 generalized muscular spasms, in corpulence, and now and again 



