Sugar (glucose) is usually present in the urine at very low levels or not at all. Abnormally high amounts of sugar in the urine, known as glycosuria, are usually the result of high blood sugar levels. High blood sugar usually occurs in diabetes, especially when untreated. Drugs like SGLT2 inhibitors normalize blood glucose by causing excretion of unwanted glucose in urine . So a diabetic person on treatment with SGLT2 inhibitors can show normal blood glucose with increase urine Glucose.