flat lesion with well circumscribed change in skin color less than 1 cm
freckle (ephelide), labial macule
macule
macule>1cm
large birthmark (congenital nevus)
patch
elevated solid skin lesions <1cm
mole (nevus), acne
papule
papule >1cm
psoriasis
plaque
small fluid containing blister <1cm
chicken pox(varicella), shingles (zoster)
vesicle
large fluid containing blister >1cm
bulls pemphigoid
bulla
vesicle containing pus
pustular psoriasis
pustule
transient smooth papule or plaque
hives (urticaria)
wheal
flaking off of stratum corneum
eczema, psoriasis, SCC
scale
dry exudate
impetigo
crust