Back to Ask the Diabetes Team Ask the Diabetes Team

From Kent, England:

Why do I get thirsty when my blood sugars are high?


When there is a lack of insulin or an error in diet, as may happen in type 1 diabetes, blood glucose levels will be higher with the eventual presence of glucose in the urine (glycosuria). The kidney then will try to reabsorb as much glucose as possible from the urine even when blood glucose level is above a certain level. The kidney glucose transporter is saturated and the glucose will be passed out with the urine instead. The continuous loss of glucose in the urine increases the volume of urine with a larger amount of urine voided over the day. This dehydration secondary to glycosuria makes the diabetic feel thirsty.


Original posting 26 Sep 2005
Posted to Hyperglycemia and DKA and Other


  Back to Ask the Diabetes Team Return to the Top of This Page

Last Updated: Tuesday April 06, 2010 15:10:04
This Internet site provides information of a general nature and is designed for educational purposes only. If you have any concerns about your own health or the health of your child, you should always consult with a physician or other health care professional.

This site is published by T-1 Today, Inc. (d/b/a Children with Diabetes), a 501c3 not-for-profit organization, which is responsible for its contents. Our mission is to provide education and support to families living with type 1 diabetes.
By using this site, you agree to our Terms of Use, Legal Notice, and Privacy Policy.
© Children with Diabetes, Inc. 1995-2018. Comments and Feedback.