Normal thirst and diabetic thirst are different, and can usually be distinguished from several aspects of mechanism, accompanying symptoms, and the degree of relief: I. Mechanism 1, normal thirst mechanism: the human body is dehydrated, the concentration of ions in the plasma changes, affecting the osmotic pressure, stimulating the hypothalamic thirst center, the human body will appear thirsty feeling; 2, diabetic thirst mechanism: due to absolute or relative insulin deficiency, glucose metabolism When it passes through the kidneys, it is excreted with urine because it exceeds the capacity of renal tubular reabsorption, and osmotic diuresis occurs. The volume and frequency of urination of patients increase significantly, and excessive drainage leads to a decrease in the water content of the patient’s body and manifests thirst. The symptoms accompanying thirst in normal people are: dry mouth, haggard face, collapsed eye sockets, dry skin that cannot be stretched, etc.; 2. The degree of relief 1.The degree of relief for normal people: after replenishing fluids, thirst can be relieved, and there is no significant increase in urine volume; 2.The degree of relief for diabetic patients: patients will be repeatedly thirsty, and thirst symptoms are temporarily relieved after drinking a lot of water, while urine volume is relatively high, and the phenomenon of urinating a lot of times appears.