It’s not often that you hear a nutritionist tell you to cut back on your fiber intake. But while fiber is incredibly important, too much can exacerbate bloat in people who are sensitive. When experiencing PMS it’s best to monitor your intake of high–fiber foods, especially bran cereals, beans, lentils, and high–fiber bars. When you do eat these foods, drinking plenty of flat water can help wash them all down and promote smoother digestion.