Pink and swolen-ish under my eye...why and how do i get rid of it?

well its strange. Im sure its cuz i was scratching it to much..my skin is sensitive. bu anyways it happens aloe, whn im sleeping i dream im scratching and wake up its swollen and red under my eye. Ug i hate it why am i so strange -_- lol. Has this happened to anyone? and how do i make the swelling go down? I also sometimes get it right over my eyelid so it looks like my eye is smaller or something cuz the swelling pushes my eyelid down so its just plain strange looking when the other eye is normal xO