Why diabetes patients often feel thirsty

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When high blood sugar in diabetics, glucose from the glomerular filtration over a tubular glucose reabsorption capacity, resulting in large amounts of glucose dissolved in the urine, and take away a lot of water, resulting in osmotic diuresis. Water loss makes diabetics feel thirsty. Diabetes polydipsia, polyuria can use the following to represent this causal chain: blood sugar urine appears → → → dehydration → plasma increased urine osmolality → → thirsty to drink. The more severe diabetes, polydipsia, urinary symptoms more obvious. If too much urine in diabetic patients can not be discharged, sufficient quantity of drinking water, water loss reached 10% when the body will feel thirsty, palpitations, fatigue, blood sugar rises; If the water loss of 20%, there will be irritable, delirium, coma, blood pressure, and even life-threatening. Some elderly patients with diabetes, cerebral arteriosclerosis because it is not sensitive to thirst center in the hypothalamus, the body in dehydration, plasma osmolality rises, does not feel thirsty. Since water can not be timely, osmotic diuresis has continued to make water loss, plasma osmolality will be further increased in patients with diabetic hyperosmolar coma may occur, manifested as fatigue, loss of appetite, vomiting, severe manifestations of irritability, apathy and even coma, shock. Thus, even in diabetic patients usually have to add enough water, not drink, at least to meet the normal physiological function of moisture, which is necessary to drink some water when thirsty, insensitive for elderly patients drink a day can be developed water, time, time to drink water.

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