at night. In other
cases, when the skin is not sensitive, and zinc or mercury has not
been used, the employment of sulphur soap and hot water at bedtime,
allowing the suds to dry and remain on the face during the night, is
to be recommended. An ointment consisting of half a dram of
precipitated sulphur with half an ounce each of powdered starch and
vaseline applied each night, and hot water used on the face three
times daily are also efficacious. Sulphur lotion is better than
sulphur ointment.

=COLD SORE; FEVER BLISTER.=--Cold sores occur usually about the lips
or at the angles of the mouth, although they may appear anywhere on
the face. Cold sore has a round, oval, or irregular outline, from the
size of a pea to that of a quarter of a dollar, and is seen as a
slightly raised patch on the skin on which is a group of very minute
blisters, three to twelve in number. Cold sore may be single or
multiple, and near together or widely separated on the face. Having
first the appearance of a red patch, it later becomes covered with a
brown crust from the drying of the contents of the tiny blisters. Cold
sore often gives rise to burning, itching, or tingling, the
disfigurement usually causing more annoyance, however, than the pain.
The duration of the trouble is from four to twelve days.

Cold sores are commonly induced by indigestion and fevers, and also
are occasioned by local irritation of any sort, as from nasal
discharge accompanying cold in the head (from which the name is
derived), by the irritation produced by a pipestem or cigar, and by
rubbing the skin.

=Treatment.=--Picking and scratching are very harmful, and cigar or
pipe smoking must be stopped. Painting the sore with collodion, by
means of a camel's-hair brush, is poor treatment in the early stages.
Better use spirits of camphor, and afterwards, if there is much
itching or burning, sopping the eruption with calamine lotion (p. 145)
will relieve the discomfort.

=PRICKLY HEAT= (_Miliaria_).--This is a common eruption of adults in
hot weather, and very frequently attacks children. It consists of
fine, pointed, red rash, or minute blisters, and occurs on parts of
the body covered by clothing, more often on the chest. The eruption is
caused by much sweating, leading to congestion and swelling of the
sweat glands. Burning, stinging, and itching accompany the disorder.
The condition must be distinguished from the contagious skin
eruptions. In the latter ther