Typical symptoms of diabetes include polyuria, excessive water intake, excessive food intake, and weight loss. In case of acute and chronic complications, symptoms such as nausea and vomiting, blurred vision, and foamy urine may also occur. There are also some diabetic patients with insidious onset of disease and no obvious related symptoms. 1. polyuria: after diabetes, due to the high blood glucose content in the body, the kidneys can not filter out glucose, and the excess glucose can not be absorbed by the body, there will be osmotic diuresis, increased excretion of urinary glucose, so the amount of urine also increased. 2. Drinking more water: due to the patient’s polyuria, the water in the body flows faster, which in turn leads to thirst and excessive drinking. 3. Eating more: As the glucose in the patient’s body cannot be absorbed and utilized, it further stimulates the food center, which makes the person feel hungry and needs to be supplemented with food in order to improve. But even after supplementing food, the glucose in the body cannot be utilized, and glucose is excreted from the urine, so the patient is always in a state of hunger, and there is polyphagia. 4. Weight loss: the ability of peripheral tissues to utilize glucose decreases, the decomposition of body fat increases, and the metabolism of protein is in a negative balance, the patient will gradually experience weakness and emaciation, and the development of children will be hindered. If acute complications occur, such as ketoacidosis, nausea, vomiting, abdominal pain, deep breathing, coma and other symptoms; if chronic complications occur, such as diabetic nephropathy, diabetic retinopathy, etc., foamy urine, blurred vision and other symptoms. If you suspect that you have diabetes, it is recommended that you go to the hospital in time.