primary lesions
secondary lesions
Differences between skin lesions
primary
secondary
100

large blisters, containing a water fluid; similar to a vesicle

Bulla

100

slightly raised or depressed area of the skin 

scar

100

these might require medical referral

secondary

100

pus is at the top lesion

pustule

100

dead cells

crust

200

a small elevation on the skin that contains no fluid

papule

200

crack in the skin

FISSURE

200

structural change in the tissue caused by damage or injury.

lesion

200

an itch swollen lesion

wheal

200

penetrates the dermis

fissure

300

abnormal mass

tumor

300

Open lesion on the skin or mucous membrane of the body

ulcer

300

piles of material on the skin surface

secondary lesion

300

can be drained of fluids

cyst

300

accompanies by loss of the skin depth and possibly weeping fluids

ulcer

400

a solid bump lager than 0.4 inches

nodule

400

thin, dry, or oily plate

scale

400

vascular lesions involve the blood the circulatory system

tertiary

400

also known as a freckle or age spot

macule

400

skin sore or abrasion

excoriation

500

flat spot or discoloration

macule

500

a thick scar resulting in excesive skin

keloid

500

lesions in the the initial stages of development

primary lesions

500

cannot be drained of fluid

tubercle

500

accumulation of sebum and pus

crust

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