Diabetic patients will have a variety of clinical manifestations, and at first people discovered the disease from the sweet smell in the urine. Today we will talk about the common characteristic changes in the urine of diabetic patients. 1. positive urine glucose In normal people, there is only a trace of glucose in the urine, but when the blood sugar rises beyond the ability of the kidneys to reabsorb, medically known as the renal glucose threshold (generally 8.88 mmol/L), glucose will appear in the urine, and the urine routine examination will show positive urine glucose (+), the more urine glucose + sign, indicating higher blood sugar. 2. Increased urine volume An increase in urine volume of more than 2500ml in 24 hours is called polyuria. An increase in glucose in the urine of diabetic patients causes an increase in solutes in the urine, which leads to solute diuresis, manifested as an increase in urine volume. In addition to polyuria, this type of patient often has symptoms such as thirst and excessive drinking, which is also known as “thirst” in Chinese medicine. 3. Proteinuria When diabetes develops to a certain stage and is complicated by diabetic nephropathy, protein will appear in the urine, called proteinuria, and urine protein will be positive in routine urine tests. Some severe diabetic nephropathy will show a large amount of proteinuria, leading to hypoproteinemia and causing generalized swelling. These patients will feel more foam in their urine when they urinate. Patients who have proteinuria should have their kidney function routinely checked. 4. Ketone bodies When a diabetic patient develops ketoacidosis, ketone bodies will appear in the urine and the urine routine will show positive for ketone bodies, and the patient’s urine will smell like rotten apples. The presence of ketone bodies means that the body’s fat breakdown is active but oxidation is incomplete, which suggests that the patient may develop a diabetic coma and needs to be taken seriously.