Skin Lesion

any visible, localized abnormality of skin, such as a wound, rash, or sore.

Primary Lesions

initial reactions to an underlying problem that alters one of the structural components of the skin.

Seborrheic Keratosis

benign skin lesions, often with older people, can be deeply pigmented.

Shingles

painful rashes following the underlying route of cranial or spinal nerves that are inflamed by the virus.

Verruca

benign warty skin lesions.

Herpes simplex virus (HSV)

fever blisters, most common in adults

Herpes Zoster

causes shingles & occurs with reactivation of the herpes.

Cyst

a raised area of skin filled with liquid.

Nodule

raised area of skin.

Macules

discolored spots, nonraised (freckles).

Papules

raised, moles.

Plaque

elevated, large patch, looks like dandruff.

Wheals

often in allergic reactions, irregularly shaped, slightly raised lesions that usually itch.

Secondary lesions

can occur with the progression of a disease.

Atrophy

thinning with the loss of skin markings, stretch marks.

Ulcers

deep, irregular erosions.

Fissure

linear cracks in the epidermis.

Scales

dried fragments of sloughed epidermis.

Keloids

overgrowth of scar tissue after a skin injury.

Laceration

torn, jagged.

Incision

smooth-edged.

1st degree burn; superficial burn

epidermis only.

2nd degree burn; deep-partial thickness burn

epidermis, into the dermis layer.

3rd degree burn; full thickness burn

epidermis, dermis, into the underlying fat layer

4th degree burn; deep full thickness burn

all skin layers, muscle, and bone are damaged.

Cellulitis

acute infection of the skin, characterized by heat, redness, pain, and swelling.

Contact dermatitis

rash resulting from contact with an irritant, ex. poison ivy.

cyanosis

blue discoloration, lack of oxygenated blood to tissue.

Frostbite

damage to skin tissues and blood vessels resulting from long exposure to cold.

Furuncle

skin infection originating in a gland or hair follicle, a boil.

ichthyosis

dry scaly skin.

Lyme disease

by bite of an infected tick.

mycodermatitis

(myc/o, fungus) Inflammation of the skin caused by a fungus.

necrosis

Death of areas of damaged or diseased tissue or bone surrounded by healthy tissue (

pediculosis

Infestation by lice and named for a genus of sucking lice, Pediculus. There are head lice, body lice, and pubic lice.

petechiae

Tiny purple or red spots appearing on the skin as a result of tiny hemorrhages within dermal or submucosal layers

psoriasis

Common chronic skin disorder characterized by circumscribed red patches covered by thick, dry, silvery scales

urticaria

Skin eruption characterized by wheals of varying shapes and sizes with well-defined margins and pale centers. Its causes include drugs, foods, and insect bites. Also called hives