Have you ever felt so dehydrated that nausea followed? Maybe you've been feeling nauseous but cannot pinpoint the reason. Dehydration may be at fault! Learn the basics to determine if your nausea could be the result of dehydration. To have your symptoms medically diagnosed, visit the walk-in clinic at AFC Urgent Care Castle Rock today. What is Dehydration? In basic terms, dehydration is losing more fluid than you're drinking. Maybe you need to ...