By Rachel Passarella, as told to Newsweek When a red spot first appeared on my tongue, I didn’t think much of it. I was two weeks out from a devastating breakup—the kind that knocks the wind out of you and leaves your whole body buzzing with stress. I wasn’t sleeping, I wasn’t eating well, and I was crying constantly. So, when I noticed a tiny, sore red patch on the right side of my tongue, no bigger than half a pinkie fingernail, I assumed it was just my body reacting to the emotional chaos.