a large irregular patch or unsightly mark on the skin or another surface.
red blotches on her face
patch,smudge,pop,dot,spot,speck,speckle,blot,stain,smear,streak,dab,daub,splash,splotch,splodge,rash,blemish,freckle,birthmark,strawberry mark,port wine stain,eruption,mark,discoloration,naevus,haemangioma
cover with blotches.
her face was blotched and swollen with crying
spot,mark,speck,speckle,smudge,smear,streak,blemish,cover with blotches