This section is from the book "Hartmann's Theory Acute Diseases And Their Homoeopathic Treatment", by Charles J. Hempel. Also available from Amazon: Theory of acute diseases, and their homoeopathic treatment.
§ 91. Exanthematic Fevers.
A few short remarks on cutaneous eruptions generally:
An exanthem is an inflammatory process of the various layers of the skin, in consequence of which the colour and form of the skin change. These alterations of the skin are quite different from those occasioned by mechanical causes, injuries, burns, vesica-tories, sinapisms, etc. An eruption has to be treated differently, according as it is seated in one or the other layer of the skin. This observation applies particularly to old eruptions, the successful treatment of which requires that their primitive form should be correctly ascertained.
Eruptions may be classed under the following heads:
(b.) Papulosa, pimples, slight elevations on the epidermis, without pustule, as in purpura miliaris, morbili, rubeola, miliaria, essera, verruca.
(d.) Crustacea, with dry crusts, as in dry herpes, tinea, serpigo. 1