1, polyuria Is due to high blood sugar, more than the renal sugar threshold (8.89 ~ 10.0mmol/L), the glucose filtered out by the glomerulus can not be completely reabsorbed by the renal tubules, the formation of osmotic diuresis. The higher the blood glucose, the more urinary sugar excretion, the more urine volume, and so on in a vicious circle. 24h urine volume can reach 5000 ~ 10000ml, and some patients can urinate more than 20 times a day. 2, drink more Due to excessive urination, excessive water loss, intracellular dehydration occurs, stimulating the thirst center, to drink water to make up. Therefore, the more you urinate, the more you drink naturally, forming a positive relationship. 3.More food Due to excessive sugar loss in urine, such as daily sugar loss of 500 grams or more, the body is in a state of semi-starvation, lack of energy causes hyperphagia, increased food intake, increased blood sugar, increased urine sugar, and so on. 4, wasting Because the body can not make full use of glucose, so that the fat and protein decomposition accelerated, excessive consumption, weight loss, the appearance of physical wasting. 5.Lethargy is also common in diabetic patients, because glucose cannot be fully oxidized, i.e. the body cannot make full use of glucose and effectively release energy, while tissue water loss, electrolyte imbalance and negative nitrogen balance, etc., thus feeling general weakness and depression. The typical symptoms of diabetes are “three more and one less”, however, not all patients are like this. Some patients mainly drink and urinate a lot, some suffer from lethargy and fatigue, and some have deformities or chronic complications as the first symptom, and further examinations only reveal such things as cerebrovascular accidents, coronary heart disease, and vulvar itching in female patients. Some patients were not even diagnosed until the occurrence of ketosis, acidosis, and hyperosmolar coma. I hope that patients everywhere do not wait until such a serious time to seek medical attention, diabetes is not terrible, must establish information! If you have a disease, you need to be treated early, I will try my best to relieve your pain and work together to restore a healthy body!