A person with polyuria makes large amounts of urine. In uncontrolled diabetes, polyuria occurs because of high blood sugar levels. The kidneys remove some of this excess sugar from the body. To do this, the kidneys produce abnormally large amounts of urine.
Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor.
© 1995-2015 The Nemours Foundation/KidsHealth. All rights reserved.