nd support the strength.

[SKIN DISEASES 53]

DISEASES OF THE SKIN.

The skin is divided into three layers. Beginning with the outer one and
naming inward, they are named as follows: The outer layer is called the
epidermis or cuticle (near or upon the skin). The second layer is called
the corium, derma cutis vera, or true skin. The third layer is called the
sub-cutaneous (under the skin) (fatty or connective) tissue. This last
layer contains the sweat glands, the lower end of the deep-seated hair
follicles, (little sacs containing the roots of the hair) and larger
branches of the lymphatics, blood vessels and nerves, and serves in
general as a bed for the true skin to rest upon, and by which the true
skin is connected with the deeper parts, muscles, etc. The appendages of
the skin are the hair, nails, sebaceous and sweat-glands. The discharge
from the sweat-glands form a little or larger tumor. The contents of a wen
are from sebaceous glands--fat secretions--fat tumor. The following names
are frequently mentioned in the skin diseases:

Macule. (Spots, patches). Skin is altered in color, but the skin is not
raised or depressed; freckle, etc.

Papule. (Pimple). Elevated piece of skin, varying in size from a pin-head
to a coffee bean.

Tubercle. (Node-lump). A solid elevation of the skin, varying in size from
a pea to a cherry.

Tumors. These are soft or firm elevations of the skin, like a wen or hard
lump. They are always deep-seated.

Wheel. A round flat, white or pink elevation of the skin; such as hives,
mosquito bites, etc.

Vesicle. This is a pin-head or pea-sized elevation of the outer layer
(epidermis) filled with a watery fluid.

Bleb. (Bulla). A circumscribed elevation of the skin and contains a watery
fluid, such as a burn, etc.

Pustule. A rounded elevation of the outer layer (epidermis) of varying
size, containing pus (matter).

A vesicle, bleb, and pustule are hollow; macule, papule, and tubercle are
solid.

Scale. (Squama). This is a dry attached or unattached thin piece from the
skin as a result of disease of the skin.

Crust. This is a dried mass as a result of fluid oozing from a diseased
skin.

Excoriation. Like a scratch mark.

Fissures. This is a crack, like that found on chapped hands.

Ulcer. (Sore). Eating away of the parts.

Scar. Ulcer healed leaving a mark, like from a healed cut.

Pigmentation. Discoloration.

ACNE. (Simple Acne).--This is an inflammation of t