blemish

nouns

a mark or flaw that spoils the appearance of something (especially on a person's body)
"a facial blemish"
blemish, defect, mar

verbs

mar or spoil the appearance of
"scars defaced her cheeks"; "The vandals disfigured the statue"
blemish, deface, disfigure
mar or impair with a flaw
"her face was blemished"
blemish, spot
add a flaw or blemish to; make imperfect or defective
blemish, flaw