The blemish was ugly
you have a huge blemish on your forehead!
The girl had a huge blemish on her face.
Blemish
To blemish is to spoil the beauty or perfection of something.
Without fault; not defective or imperfect; free from blemish; free from incorrectness, vice, or offense; perfect; as, a faultless poem.
pimple or zit!
zit
Blemish
'without dishonor' or 'without blemish'.
"Random" is a word which has the meaning haphazard without aim.
Macula, dot, blemish, pigmentation...