People with diabetes who have high blood sugar, or who have been diabetic for a long time and have lowered renal glucose domains, can can have a positive urine sugar, but conversely, a positive urine sugar is not always diabetes. What else may cause high urine sugar? 1, endocrine diseases caused by urinary glucose: hyperthyroidism, pheochromocytoma, Cushing’s syndrome. These are mostly due to growth hormone, thyroxine, adrenaline, corticosteroid, glucagon, etc. can make blood sugar rise. 2, renal diabetes: chronic nephritis, nephrotic syndrome, familial diabetes. Due to the renal tubular epithelial cells of glucose reabsorption function, caused by the lowering of the renal glucose threshold due to the elevation of urinary glucose. 3, drug-induced pseudoglycosuria Drug-induced vitamin C, glucuronic acid, isoniazid, streptomycin, aspirin, chloral hydrate, and Huanglian, Scutellaria baicalensis, rhubarb and so on, may also cause false positives. 4, mental factors, large amounts of glucose, or eating sugar caused by transient diabetes: large amounts of carbohydrates, or intravenous glucose, or eating sugary foods can cause transient diabetes. Excessive mental stress can cause psychogenic diabetes.