We all know we should be drinking more water. You hear it all the time. Lose just 1.5% of the water in your body and you are officially experiencing mild dehydration. While most people know things like exercise and lack of water intake can make you dehydrated, it can also be brought on by stress, diabetes, a woman’s menstrual cycle, low-carb diets, and more. But what actually happens to your body when it’s dehydrated?