large blister containing watery fluid
bulla
Closed, abnormally developed sac that contains pus, semifluid, or morbid matter, above or below the skin
cyst
Flat spot or discolouration on the skin
macule
A solid bump larger than 1 cm
nodule
A small elevation on the skin that contains no fluid, but may develop pus
papule
Raised, inflamed, papule with a white or yellow center containing pus
pustule
Abnormal mass varying in size, shape, and colour
tumor
A small blister or sac containing clear fluid, lying within or just beneath the epidermis
vesicle
An itchy, swollen lesion that can be caused by a blow, scratch, insect bite, or skin allergy
wheal
Dead cells that form over a wound while healing; accumulation of sebum and pus, sometimes mixed with epidermal cells
crust
Skin sore or abrasion produced by scratching or scraping
excoriation
Crack in the skin that penetrates the dermis
fissure
A thick scar resulting from excessive growth of fibrous tissue.
keloid
Thin, dry, or oily plate of epidermal flakes
scale
Slightly raised or depressed area of skin that forms as a result of the healing process
scar
Open lesion on the skin or mucous membrane of the body; accompanied by loss of skin depth and possibly weeping of fluids or pus
ulcer