Got a problem? Tea can fix it! Use this guide to find the best tea prescription for whatever's bugging you. By Sunny Sea Gold, REDBOOK.If your tummy is upset...sip peppermint. Peppermint relaxes the muscles responsible for stomach cramps, says Peggy Kotsopoulos, nutritionist and host of Peggy K's Kitchen Cures. And it may also help with gas and diarrhea.