ll, by the presence of concomitant symptoms of syphilis, such as
glandular enlargement, sore throat, mucous patches, rheumatic pains, and
falling out of the hair.

#State the prognosis of pityriasis rosea.#

It is favorable, the disease tending to spontaneous disappearance,
usually in the course of several weeks or one or two months.

#What treatment is to be advised in pityriasis rosea?#

Laxatives and intestinal antiseptics, and ointments of salicylic acid
(5-15 grains to the ounce), of sulphur (10-40 grains to the ounce); or a
compound ointment containing both these ingredients can be prescribed.
The ointment base can be equal parts of white vaselin and cold cream; in
some instances Lassar's paste (starch powder, zinc oxid powder, each,
[dram]ij; vaselin, [dram]iv) seems more satisfactory.

#Dermatitis Exfoliativa.#
(_Synonyms:_ General Exfoliative Dermatitis; Recurrent Exfoliative
Dermatitis; Desquamative Scarlatiniform Erythema; Acute General
Dermatitis; Recurrent Exfoliative Erythema; Pityriasis Rubra.)

#Describe dermatitis exfoliativa.#

Dermatitis exfoliativa is an inflammatory disease of an acute type,
characterized by a more or less general erythematous inflammation, in
exceptional instances vesicular or bullous, with epidermic desquamation
or exfoliation accompanying or following its development. Constitutional
disturbance, which may be of a serious character, is sometimes present.
It is a rare and obscure affection, running its course usually in
several weeks or months, but exhibiting a decided tendency to relapse
and recurrence. In many cases it is persistently chronic, with
exacerbations and remissions. In some instances it develops from a
long-continued and more or less generalized eczema or psoriasis, and in
exceptional cases it is started by the careless use of mercurial
ointment and of chrysarobin ointment.

[Illustration: Fig. 19. Dermatitis Exfoliativa.]

In another type of the disease, formerly described as _pityriasis
rubra_, the skin is pale red or violaceous-red, but is rarely thickened,
continued exfoliation in the form of thin plates taking place. Its
course is variable, lasting for years, with remissions.

An exfoliating generalized dermatitis is exceptionally observed in the
first weeks of life (_dermatitis exfoliativa neonatorum_), lasting some
weeks, and in most cases followed by recovery. There are no special
constituti