al
members of the same family, and are usually associated with hare-lip.
The treatment consists in dissecting them out.

#Injuries of the Soft Parts of the Face.#--Owing to its free blood
supply, the skin of the face has great vitality, and even when
severely lacerated it not only survives, but shows such resistance to
bacterial infection that primary union frequently takes place. In
plastic operations, also, even extensive flaps seldom become infected,
and they heal so rapidly that the sutures can be removed in two or
three days.

In _incised_ wounds the bleeding is usually free at first, but unless
one of the larger arteries, such as the external maxillary (facial) or
temporal, is injured, it soon ceases. Paralysis of the muscles of
expression may follow if the facial nerve is injured; and loss of
sensation may result from injury to the supra-orbital or infra-orbital
nerves. If the parotid gland is implicated, saliva may escape from the
wound, but it usually ceases in a few days; if the duct is involved, a
persistent salivary fistula may form.

_Punctured_ wounds may perforate the orbit, the cranial cavity, or the
maxillary sinus, and be followed by infective complications,
particularly if the point of the instrument breaks off and is left in
the wound.

_Contused and lacerated_ wounds result from explosions and injuries by
firearms, and foreign bodies, such as particles of stone or coal, or
grains of gunpowder and small shot, may lodge in the tissues. Every
effort should be made to remove such foreign bodies, as if left
embedded they cause unsightly pigmentation of the skin. Ligatures are
seldom necessary for the arrest of haemorrhage unless the larger
branches are injured, as the bleeding from smaller twigs is arrested
by the sutures. The edges of the wound are approximated by means of
Michel's clips, or by a series of interrupted horse-hair stitches, and
for this purpose a fine Hagedorn needle is to be preferred, as it
leaves less mark than the ordinary bayonet-shaped needle. If the
mucous membrane of the mouth or of the eyelid is implicated, its edges
should be approximated by a separate row of catgut stitches.

_Cicatricial contraction_ after severe burns may lead to marked
deformities of the eyelids (ectropion), mouth, and nose. When the burn
has implicated the neck, the chin may be drawn towards the chest, and
the movements of the lower jaw and head seriously impeded.

#Bacterial Disease.#--_Boils_, _ca