When it’s hot outside and you’ve been sweating, you get thirsty. Why? Thirst is a sign of dehydration (say: dee-hye-dray-shun). Dehydration means that your body doesn’t have enough water in it to keep it working right. A person gets water by drinking and eating. You lose water when you sweat, urinate (pee), have diarrhea, or throw up. You… Continue reading