DISEASES OF THE SKIN AND HAIES. 119 



exciting, irritant, or acid properties, it is to be recommended 

 as much, if not more, than the benzoated ointments. 



Diseases arising from General Causes. 

 ERYTHEMATOUS OE EXANTHEMATOUS ERUPTIONS. 



These are maladies characterised by inflammatory blush. 

 The redness of inflammation is not so constantly an appreci- 

 able symptom in the lower animals as in man; but the 

 irritation, swelling, and heat diffused or circumscribed, enable 

 us to distinguish, in animals at least, three of the four dis- 

 orders described in man included under this head. 



ERYTHEMA. 



Under this head are included inflammations of the surface 

 of the skin, produced by causes operating locally, and often 

 dependent on systemic or constitutional causes. 



The causes of erythema are cold and heat alternately ope- 

 rating on the skin ; wet, depriving the skin of its natural 

 covering, hair or wool; dirt, friction, pressure, and keeping 

 dirty clothing or harness on animals. As constitutional 

 causes, we have plethora in some cases, and poverty in others. 



There are three diseases included under this head. 



ERYTHEMA INTERTRIGO. 



The term 'intertrigo' signifies a chafe, gall, or fret, and the 

 expression 'erythema intertrigo' is employed to indicate all 

 those inflammations of the cutaneous surface dependent on 

 the friction of one part of the skin against another, the irri- 

 tation due to discharges flowing over the skin, &c. 



In the horse this disease is seen in hot weather from 



