I heard that putting toothpaste on a pimple and covering it with a band-aid and leaving it over night would make the pimple go away. I tried this a few days ago and was fairly successful. But when I tried again last night and woke up this morning, there was a huge red spot (that looks like a bruise or like I burnt myself) from the toothpaste. It still hasn't gone away and I don't know how to fix it. Please answer with suggestions on how to make the redness go away.