Human: My doctor says that I'm dehydrated. What does this mean? Assistant: 
Dehydration can be a serious medical condition, so it's important to take steps to address it as soon as possible. It occurs when the body doesn't have enough water in it. Symptoms of dehydration include dry mouth, thirst, fatigue, and dizziness. If left untreated, dehydration can lead to more serious health problems such as kidney failure or even death. To help prevent dehydration, drink plenty of water throughout the day and keep your fluid intake up during hot weather. You should also avoid caffeine and alcohol which can make dehydration worse.