The student's guide to medical diagnosis / by Samuel Fenwick.

  • Samuel Fenwick
Date:
1886
Catalogue details

Licence: Public Domain Mark

Credit: The student's guide to medical diagnosis / by Samuel Fenwick. Source: Wellcome Collection.

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    ■skin is raised into pimples, and if so begin at (476). If this is not the case, see if there is an increased formation of epidermis (480); otherwise pass on to (486). Remember that papular diseases are often followed by a scurfy condition; you distinguish them from the squamous affections by the total absence in the latter of any pimples. a. The eruption is papular. You may have three diseases under this head— lichen, prurigo, and scabies (496). 476. a. a. The eruption consists of a number of minute pimples, generally of a red colour, sometimes separate, at other times grouped together, and at- tended by itching of a tingling character. The disease is lichen. The complaint sometimes' commences with slight fever, and lasts only for a week or ten days, but usually it runs a more chronic course. It ordinarily affects the parts where the skin is thickest, as the back of the forearms and hands, and the outside of the thigh and leg. When lichen occurs in children it is named Strophulus, and is often dependent on teething or derangement of the digestion. The chief varieties of lichen are— L. Circiwnscriptus.—Clusters of pimples of an irre- gularly circular form. L. Agrius.—The irritation of the skin being severe. 477. Lichen is distinguished from scabies by the latter presenting vesicles as well as papules, by the eruption being situated where the skin is fchin, as between the fingers, and by the discovery of the aeari or their eggs. From eczema, by the edges of the patches of lichen showing papules, not vesicles, by the skin being thicker, rough and harsh, and not having the yellow crusts of tbe former. 478. b. b. The eruption presents scat!civil, and rather flattened papulte, scarcely differing in colour from the surrounding skin, but usually covered with a small black scab. The skin is generally thickened,