pesky side effects Health.com 12 Reasons Why Dehydration Is Bad for Your Body dehydration younger dehydrated dehydration properly hydrated pesky side effects muscle cramps working a lot harder working a lot harder headaches low energy levels constipation This article originally appeared on Health.com. Check out this article: dehydration feel Dehydration muscle cramps http://www.health.com/health/gallery/0,,20924876,00.html