What Are the Common Signs of Dehydration, and When Should You See a Doctor?

Feeling extra thirsty, having a dry mouth, or peeing dark yellow are signs you might be dehydrated. Feeling tired, dizzy, or not peeing much can also be clues. If things get serious with a fast heartbeat, confusion, or passing out, it’s time to call the doc. Don’t wait if you’re feeling dehydrated—getting help can prevent bigger problems.