The hygiene of the skin, or, The art of preventing skin diseases / by A. Ravogli.

Date:
1888
Catalogue details

Licence: Public Domain Mark

Credit: The hygiene of the skin, or, The art of preventing skin diseases / by A. Ravogli. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    the beginning of the third week, and rarely last until the fourth. In Typhus exanthematicus, on the other hand, these rose-colored spots disappear during the second week only in the very mildest cases; but in the severer casee ' they remain at least two weeks, are of a deeper red, and do not disappear entirely under pressure, but leave a stain. This stain is due to pigmentation produced by the presence of haemoglobin, which is extravasated into the surrounding tissues. In very bad cases extravasations of blood take place, and the roseola spots become true petechia?. ERYSIPELAS. Erysipelas is sometimes referred to as a dermatitis or sim- ple inflammation of the skin, but it belongs to the contagious diseases, and is only the expression of a constitutional im- pression, and therefore should be classed among the pseudo- exanthems. It is characterized by a rapidly spreading in- flammatory process upon the surface of the skin and mucous membranes; by redness of the surface; by fever, pain, burn- ing sensations, and oedema and swelling of the skin. It is preceded usually by prodromal symptoms, such as a general malaise, loss of appetite, vomiting, diarrhoea, joint-pains, chill and fever. It begins chiefly at the margins of wounds, however slight, suppurations, etc. The edge of a wound begins to look red and the prodromal symptoms are noticed. This redness spreads over a limited area, becomes circum- scribed, and the disease is then known as Erysipelas circum- scripta; or it may spread generally over a surface, and become Erysipelas migrans; or it may cover various por- tions of the surface, not spreading by continuity, but jump- ing from one place to another. This redness varies in in- tensity from a rose-red to a bluish-red. and disappears upon pressure, immediately to return after the pressure is removed. Small vesicles sometimes appear upon this red surface, and may increase to the size of bullae or blisters, which bursf and discharge serum. Crusts may thus be formed. The