Glossary -   Dehydration



Dehydration occurs when a person loses more water than they take in. Symptoms of dehydration are vague and include thirst, lightheadedness and diarrhea. Extreme dehydration requires hospitalization. In people with sickle cell disease, dehydration can trigger a crisis. Dehydration can be prevented by drinking plenty of water, especially when the individual is ill, in hot temperatures or participating in physical activity.