To blemish is to spoil the beauty or perfection of something.
The blemish was ugly
you have a huge blemish on your forehead!
The girl had a huge blemish on her face.
Blemish
pimple or zit!
Blemish
zit
A spot, a stain, a blemish.
I do not really think so.
Macula, dot, blemish, pigmentation...
It is simply a blemish. Its shape has no significance.
Clean, spotless