blotchblotch /blɒtʃ $ blɑːtʃ/ noun [countable] 
Word Origin
Word OriginWORD ORIGINblotch
ExamplesOrigin:
1600-1700 Perhaps from blot + botch ‘swelling’ (14-19 centuries) (from Old North French boche, from Old French boce; ➔ BOSS1)EXAMPLES FROM OTHER DICTIONARIES
Thesaurus- He had no idea what was causing the red blotches on his skin.
- I first noticed the purple blotches on my neck on Thursday.
- That red blotch in the painting is supposed to be the sun.
- The patient had purple blotches under his eyes.
- Better that those blotches meant nose cancer; at least I could go to the hospital and get flowers.
- Changes in sea temperature or salinity can cause the algae to leave, causing white blotches to form.
- If there are none of the white blotches that mean hemorrhage, he begins an examination to diagnose stroke.
- On Thursday night Chris came out in dark red blotches.
- Shimmering on the surface of the water were massive, shiny blotches of oil.
- The mouth flew open wider this time, a blotch of sick color.
- Uneven blotches and crinkly patches are on the leaf surface.
- When grown in subdued light, the leaves become greenish-brown or bronze colour with greenish blotches.
Longman Language Activatora mark on someone's skin► mark
Collocations a small area of skin that is a different colour from the rest of someone's skin: · He had two little marks on his face where his glasses had been.· She squeezed me so hard, she left a mark on my arm.
► pimple also spot British, /zit informal a small raised red mark, especially on someone's face, that appears suddenly and remains for a short time, often on young people: · He had a large red pimple on his nose.· When she was younger she had lovely skin, except for the occasional spot.· I can't go out tonight with this zit on my face!come out in spots: · Call the doctor if you come out in spots or rashes.
► freckle a very small, light-brown mark, usually on the face and arms, which some light-skinned people have from birth or get when they spend time in the sun: · Sarah had freckles and red hair.
► scar a permanent mark left after a cut or wound has become healthy again: · He had a scar across his forehead from hitting his head on the bottom of a swimming pool.leave a scar: · They say the wound's quite deep, and will probably leave a scar.
► bruise a purple or brown mark on your skin that you get because you have fallen, been hit etc: · How did you get that bruise on your shoulder?· I banged into the shelf so hard that I got an ugly purple bruise on my hip.
► blotch a large coloured mark caused by illness: · He had no idea what was causing the red blotches on his skin.· I first noticed the purple blotches on my neck on Thursday.
► blemish a small mark that spoils the appearance of someone's skin: · Her skin was perfect -- not a blemish on it.
► birthmark a mark, usually red or brown, which is on someone's skin when they are born and remains there all their life: · The police identified the girl from a birthmark on her leg.
COLLOCATIONS FROM THE CORPUSADJECTIVE► red
a pink or red mark on the skin, or a coloured mark on something—blotchy adjective—blotched adjective· On Thursday night Chris came out in dark red blotches.· They were covered in big, red, ugly blotches.· Then, in February 1944, her face became disfigured by red blotches and her skin started peeling.