Hyperglycemia Also called: High blood glucose, High blood sugar Summary Hyperglycemia means high blood sugar or glucose. Glucose comes from the foods you eat. Insulin is a hormone that moves glucose into your cells to give them energy. Hyperglycemia happens when your body doesn’t make enough insulin or can’t use it the right way. People with diabetes can get hyperglycemia from not eating the right foods or not taking medicines correctly. Other problems that can raise blood sugar include infections, certain medicines, hormone imbalances, or severe illnesses. National Institute of Diabetes and Digestive and Kidney Diseases Diagnosis and Tests A1C Test and Diabetes National Institute of Diabetes and Digestive and Kidney Diseases Glucose Tests American Association for Clinical Chemistry Find an Expert American Diabetes Association American Diabetes Association Directory of Diabetes Organizations National Institute of Diabetes and Digestive and Kidney Diseases National Institute of Diabetes and Digestive and Kidney Diseases National Institute of Diabetes and Digestive and Kidney Diseases Clinical Trials ClinicalTrials.gov: Hyperglycemia National Institutes of Health Array Diabetic hyperglycemic hyperosmolar syndrome Diabetic ketoacidosis High blood sugar Hyperglycemia – infants Ketones urine test Related Issues Diabetic Hyperosmolar Syndrome Mayo Foundation for Medical Education and Research Diabetic Ketoacidosis Mayo Foundation for Medical Education and Research Hyperosmolar Hyperglycemic Nonketotic Syndrome (HHNS) American Diabetes Association Start Here High Blood Glucose: What It Means and How To Treat It Joslin Diabetes Center Hyperglycemia (High Blood Glucose) American Diabetes Association Hyperglycemia in Diabetes Mayo Foundation for Medical Education and Research Children Hyperglycemia and Diabetic Ketoacidosis Nemours Foundation When Blood Sugar is Too High Nemours Foundation Specifics Managing Hyperglycemia (High Blood Sugar) in the Hospital: a Patient’s Guide Hormone Health Network Statistics and Research Patient Access to Research American Diabetes Association Journal Articles Hyperglycemia Encyclopedia Serum ketones test Teenagers When Blood Sugar Is Too High Nemours Foundation