Every one is different, but when you take away food and/or your blood Sugar gets low most people get cranky. My wife says I get cranking when I flush. I know I have less patience. As long as you recognize it, you just learn how to deal with it. Plus it is kind of anti climatic. You're so focused on flushing then it's over, and your probably not cured of what ever ails you. You just have to change your focus to something else.