What is Glycosuria? Glycosuria is a condition that occurs when your urine contains more glucose or sugar than it should. Some of the main causes of glycosuria include kidney damage or high blood sugar levels. Glucose in urine is a symptom of both type 1 and type 2 diabetes. When the blood contains too much glucose, the kidneys may be unable to retain it all and the body excretes blood sugar through the urine. For glycosuria to occur, blood sugar concentration has to exceed 10 mmol/L or 180 mg/dl. Glycosuria can also occur when a…