472 DISEASES OE THE SKIN 



(11) Trichomycosis Capillitii. 



Similar to Leptothrix, but due to a different organism. 



(12) Trichorrhexis Nodosa. 



Small bead-like whitish swellings resembling "nits" on the 

 hair shaft causing the cortex to split, while the medulla 

 remains unbroken. The condition is probably due to a diplo- 

 coccus. 



TREATMENT. 



Epilation of diseased hairs, or 



Frequent shaving and anti-parasitic remedies. 



HERPES. 



A cluster of transparent vesicles the size of a pin's head to a pea, 

 numbering from two to twenty, seated on an erythematous patch and 

 surrounded by an inflammatory zone. 



There are two types, Herpes febrilis and Herpes zoster (Shingles). 



The former is designated Herpes labialis, facialis or progenitalis, 

 according to its position. It is symptomatic of febrile disorders, but 

 tvphoid fever is a noted exception. 



Herpes zoster is nervous in origin, and follows the distribution of 

 one or more of the posterior spinal roots on the skin. These nerves 

 correspond whh those nerves that become tender in visceral dis- 

 turbances. 



TREATMENT. 



Menthol or collodion externally and morphia internally may be 

 required ; otherwise for all herpes treat the general disorder and apply 

 anti-pruritic lotions and ointments locally. 



HYPERIDROSIS. 



General or local excessive perspiration. 



It is often associated with prickly heat. 



Do not try to check the excessive sweating, a physiological action, 

 by belladonna, but add cyllin to the daily bath, and dust the body with 

 antiseptic powder. Change the clothing frequentlv. 



ICHTHYOSIS (c^ed<; =a fish). 

 A dry, rough, scaly and sometimes warty skin of uncertain 

 causation, usually congenital, but rarely acquired. 



VARIETIES. 



(1) Ichthyosis FoUicuIaris. 



Horny skin, patches of baldness, hair replaced in certain areas 

 by pin-head papules which are surmounted by hornv spines. 

 It is non-inflammatory. 



