Why dehydrated when sick

Even if you don't have symptoms that cause obvious water losslike a runny nose, sweating, vomiting or diarrheaa cold or flu can dehydrate you in hidden ways. Just a slight rise in body temperature requires more water for metabolic reactions and breathing. On top of all that, when you're sick you just might not feel like eating or drinking as much as usual.

That's why Mom keeps reminding you to drink your fluids! A Moment of Science is a daily audio podcast, public radio program and video series providing the scientific story behind some of life's most perplexing mysteries. Learn More ». Give Now ». Noon Edition. Check locations and wait times. At Edward-Elmhurst Health, your safety and well-being continue to remain our top priority.

Learn more about our Safety Commitment. Read More. If you have reached this screen, your current device or browser is unable to access the full Edward-Elmhurst Health Web site. To see the full site, please upgrade your browser to the most recent version of Safari, Chrome, Firefox or Internet Explorer. If you cannot upgrade your browser, you can remain on this site. That's why it's important to increase water intake during hot weather or when you're ill. Sometimes dehydration occurs for simple reasons: You don't drink enough because you're sick or busy, or because you lack access to safe drinking water when you're traveling, hiking or camping.

To prevent dehydration, drink plenty of fluids and eat foods high in water such as fruits and vegetables. Letting thirst be your guide is an adequate daily guideline for most healthy people.

Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission. This content does not have an English version. This content does not have an Arabic version. Overview Dehydration occurs when you use or lose more fluid than you take in, and your body doesn't have enough water and other fluids to carry out its normal functions. Request an Appointment at Mayo Clinic. Share on: Facebook Twitter. Show references Marx JA, et al.

Infectious diarrheal disease and dehydration. Philadelphia, Pa. Accessed Aug. Aurbach PS. Dehydration, rehydration and hyperhydration.