Type 2 Diabetes Causes & Risk Factors Causes and Treatments for High Levels of Sugar in Urine By Ashley Braun, MPH, RD Ashley Braun, MPH, RD, is a registered dietitian and health content writer with over 5 years of experience educating patients on chronic diseases using science-based information. Learn about our editorial process Ashley Braun, MPH, RD Medically reviewed by Medically reviewed by Matthew Wosnitzer, MD on April 06, 2021 twitter linkedin Matthew Wosnitzer, MD, is a board-certified urologic surgeon and physician scientist. He specializes in male infertility. Learn about our Medical Review Board Matthew Wosnitzer, MD Published on April 06, 2021 Print Table of Contents View All Table of Contents Why Is Sugar in Urine? Causes Other Symptoms Diagnosis Prognosis Glycosuria is the presence of simple sugar, also called glucose, in your urine. It is normal to have a small amount of sugar present in your urine, but with some conditions, the amount of sugar can reach higher than normal levels. Glucose levels greater than 25 milligrams per deciliter (mg/dL) are considered abnormal. This can happen when blood sugar levels are too high or in some conditions where glucose is poorly reabsorbed into the bloodstream. Read on to learn more about common causes, diagnosis, prognosis, and treatment options for people with glycosuria. Andrew Brookes / Getty Images Why Is Sugar in Urine? It's normal and healthy for there to be glucose in the blood, and the normal range for blood glucose is around 70 to 110 mg/dL. When your blood is filtered through the kidneys it includes the sugar that is normally in your bloodstream. Your kidneys are then responsible for filtering this fluid reabsorbing some of the parts of blood and filtering the rest to the bladder to be excreted in your urine. Most of the sugar is reabsorbed by the kidneys and put back into the bloodstream. However, some sugar remains and travels with the rest of the fluid to the bladder to be excreted as urine (pee). Glycosuria When the amount of sugar in urine is greater than 25 milligrams per deciliter, it is considered glycosuria. This can happen for a few different reasons including high blood sugar levels and when your kidneys are not able to reabsorb enough glucose to keep it within a normal range. This can also occur due to a class of medications like empagliflozin, which removes glucose from the body by excreting urine. Causes Diabetes, Hyperglycemia, and Prediabetes Glycosuria can be common in conditions affecting the blood sugar level like: Hyperglycemia (high blood sugar) Prediabetes Diabetes Prediabetes and diabetes are diagnosed by testing the hemoglobin A1C (Hgb A1C), which shows the average level of glucose in your bloodstream over the past three months: A normal Hgb A1C is below 5.7% Levels between 5.8% to 6.4% indicate prediabetes Levels greater than 6.5% indicate diabetes Diabetes affects the hormone insulin and the body’s ability to store and use sugar as energy. With uncontrolled diabetes and elevated blood sugar levels, the kidneys aren't able to absorb all of the sugar and excretes excess from the body in urine. Kidney Disease In some types of kidney diseases, like chronic kidney disease or after a renal transplant, people without diabetes can also have elevated levels of sugar in the urine. Research shows that increased excretion of glucose in the urine is associated with increases in excreting electrolytes—like potassium and sodium—in urine and could be protective against the progression of chronic kidney disease. Renal Glycosuria In some cases, glycosuria is caused by a genetic mutation that is passed through family members. This hereditary condition affects the kidney’s ability to filter and reabsorb the sugar from your urine. This type of glycosuria typically doesn't have any other symptoms and is sometimes referred to as a benign condition. Pregnancy Because of changes in hormones and how the kidneys filter during pregnancy, glycosuria may be found in about 50% of pregnant people who have normal blood sugar levels. Often this isn't a cause for concern for many pregnant people but should still be discussed with your doctor. Screening for gestational diabetes is important (and a normal part of prenatal care) so that it can be controlled to prevent complications. Gestational diabetes also increases the risk of being diagnosed with type 2 diabetes in the future. Other Symptoms Some people with high sugar levels in their urine don’t have any other symptoms, especially when glycosuria is caused by your genetics. Even when caused by diabetes or chronic kidney disease, it is likely to go undiagnosed until the disease progress or it is found during normal screening. If your glycosuria is related to another disease, you could experience other symptoms. Diabetes If you have uncontrolled diabetes or high blood sugar levels you may experience other symptoms such as: Excessive thirst Fatigue Frequent infections or slow-healing wounds Frequent urination Changes in vision Tingling other sensations in the hands or feet Unexplained weight loss Change in alertness or passing out Difficulty focusing Seizures Erectile dysfunction Kidney Disease With chronic kidney disease, you may experience other symptoms such as: Swelling in the feet hands or ankles Shortness of breath Blood in urine increase need to pee at night Difficulty sleeping Fatigue Headaches Pregnancy It's common for glycosuria in pregnancy to have no other symptoms unless it's caused by just gestational diabetes. If you have just gestational diabetes you may experience other symptoms such as: Excessive thirst Fatigue Increased urination Weight loss Excessive hunger Increased infections When to Seek Medical Attention If you think you have sugar in your urine seek medical attention to evaluate the cause and help prevent other complications from developing. Seek immediate medical care or call 911 if you or someone you know has: Changes in level of consciousness or passing out Confusion Seizure Diagnosis Glycosuria is diagnosed by testing your urine for the amount of sugar in it. Other lab work may also be checked to look for possible causes of any increased level of glucose in your urine. Home Testing A urine glucose test can be done at home by collecting a sample of your urine and using a small device known as a urine dipstick to measure the glucose levels in the urine. Based on the amount of glucose, in the sample, the color of the dipstick will change to indicate that. If you do complete an at-home test, be sure to discuss the results with your doctor and any other concerns you have. With conditions like diabetes or chronic kidney disease, early diagnosis is important to help slow the progression of these diseases and reduce complications. Doctor Exam and Tests To test for glycosuria, your doctor will likely order a urine analysis to check the levels of sugar. They may also order blood tests to see your blood sugar levels and your kidney function. Prognosis The outlook with glycosuria depends on if there are any other conditions associated with it. If there are no other diseases are causing your glycosuria, you'll likely experience no other symptoms or complications. If you have diabetes or chronic kidney disease contributing to the glucose in your urine, it's important to have this monitored by your doctor because complications could develop if these diseases progress. Uncontrolled high blood sugar levels can lead to other complications like: Worsening eyesight or loss of vision Poor healing wounds Difficulty healing from infections Nerve damage in the arms and legs Kidney damage A Word From Verywell Glycosuria may not be cause for any concern. If you do have excess amounts of sugar in your urine, it’s important to get this tested by a doctor to rule out other conditions like diabetes or chronic kidney disease. Discuss with your doctor any treatment options that are appropriate for you and any lifestyle changes that can help with preventing complications. Was this page helpful? Thanks for your feedback! We know healthy eating is key to help manage diabetes, but that doesn't make it easy. Our free nutrition guide is here to help. Sign up and receive your free copy! Sign Up You're in! Thank you, {{form.email}}, for signing up. There was an error. Please try again. What are your concerns? Other Inaccurate Hard to Understand Submit Article Sources Verywell Health uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Poudel RR. Renal glucose handling in diabetes and sodium glucose cotransporter 2 inhibition. Indian J Endocrinol Metab. 2013;17(4):588-593. doi:10.4103/2230-8210.113725 Rušavý Z. New SGLT2 inhibitor empagliflozin: modern and safe treatment of diabetes. Vnitr Lek. 2014;60(11):926-927, 929-930. Hung C-C, Lin HY-H, Lee J-J, et al. Glycosuria and renal outcomes in patients with nondiabetic advanced chronic kidney disease. Sci Rep. 2016;6. doi:10.1038/srep39372 Prié D. Familial renal glycosuria and modifications of glucose renal excretion. Diabetes Metab. 2014;40(6 Suppl 1):S12-16. doi:10.1016/S1262-3636(14)72690-4 Alto WA. No need for glycosuria/proteinuria screen in pregnant women. 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