The pimples, even when they do not suppurate, but especially while
they continue highly red, are always sore and tender to the touch; so
that washing, the friction of the clothes, &c. are somewhat painful.
In its most severe form, this eruption nearly covers the face,
breast, shoulders, and top of the back, but does not extend lower
than an ordinary tippet in dress.
Mr. Plumbe recommends the pimples to be pricked with a needle or a
lancet, in order to irritate them, and spur them on to suppuration.
When this has been accomplished, the matter is to be squeezed out,
and if any blueness or hardness remain, sponge the part slightly,
three or four times a day, with the following lotion.
Dissolve two grains and a half of oxymuriate of mercury in
four ounces of spirit of wine.
Keep it in a close-stopped phial for use.