This section is from the book "A Treatise On The Materia Medica And Therapeutics Of The Skin", by Henry G. Piffard. Also available from Amazon: A Treatise On The Materia Medica And Therapeutics Of The Skin.
A. Burning sensation in face, pruritus, swelling, and later vesicles. Fiard, 36,5: 353.
B. Large, flat, white, and irregular papules, with severe burning pain.
The lesions persist for a few moments only. A second application will renew them, but less promptly. After several applications the skin becomes insensible to their effects, 3, 1: 397. Pustular eruption, 49, 3: 408.
C. Eczema, psoriasis, lichen agrius. Bullar, 116, 2/54, 1010.
D. Pruritus, 35, 111; (H.G.P.) Eczema, 35, 93. Gangrenous ulcers, 52, 127.
Prompt relief of burns by applying to affected parts lint moistened with tincture of urtica. Lukomski (Jour. de chim. med., '58, p. 304), 26, 727.
The properties of the two varieties of nettle are usually considered identical; and as the authors quoted have usually not distinguished between them, I have been obliged to arrange the citations under the general head Urtica. The irritant properties of the plant have been ascribed to formic acid.
 
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