Many people associate heat exhaustion with excessive sweating, dizziness, and fatigue. While these are some of the hallmark symptoms, many people are surprised to learn that heat exhaustion can also affect the digestive system. If you’ve ever felt nauseous, experienced stomach cramps, or even vomited after spending time in the heat, your symptoms may be related to more than something you just ate. Heat exhaustion develops when your body loses too much water and ...