CHAPTER XVII. 

 SKm DISEASES. 



Classification. General Causes and Treatment. Congestion of the skin, 

 • Chafing, Chilling, Irritants, Sun's Rays. Congestion with Pimples, Papules. 

 Inflammation with Blisters, Vesicles. Inflammation with Pustules. Inflam. 

 mation of horses' heels. Swelled Legs, Cracked Heels, Grease, Grapes, 

 Scratches. Inflammation of the skin with nodular swellings, Tubercles, 

 Surfeit, Urticaria. Scaly skin disease. Pityriasis, Mallenders, Sallenders, 

 Scratches. Boils, Furuncles. Nervous irritation of the skin. Neurosis, 

 Prurigo. Warts. Callosities, Black-pigment Tumors. Epithelial Cancer. 

 Parasitic skin diseases. Common Ringworm. Tinea Tonsurans. Honey- 

 comb Ringworm, Favus. Diffuse Baldness, Tinea Decalvans, Parasitic 

 Pityriasis. Parasitic Grease. Contagious Foot-rot. Mange. Scab. Itch. 

 Scabies, Acariasis. Ticks. Ixodes. Warbles, Larva of the Gadfly. At- 

 tacks of Flies, Maggots. Sheep-tick. Melophagus Ovinus. Fleas. Lice. 

 Erysipelas. Wounds — cut, punctured, bruised, torn, poisoned. Burns. 

 Scalds. 



Skin Diseases will be considered xmder the following 

 heads : 



1. Diseases due to gemral causes and embracing aU the 

 grades of inflammatory action : — congestion — a red pointed 

 eruption (papules) — a similar eruption with minute blis- 

 ters (vesicles) — the formation of larger hemispherical blis- 

 ters (bullae) — the formation of pus in these vesicles (pust- 

 ules) — the formation of round nodular transient swellings 

 (tubercles) — the excessive production of scales or dan- 

 druff (squamous) — pustules with circumscribed sloughing 

 of the deeper layers of the skin (boUs). 



2. Diseases manifested by deranged sensation — Neurosis. 



3. Diseased growtlis — warts— callosities — epithelial can- 

 cer, etc. 



