Why do diabetics often feel thirsty?

Diabetes is basically a feature, that is always feel dry mouth like thirsty, but no matter how much water or add some salt in the water can not afford the effect, is still the same way. What is the reason for this? There is some reason to follow, the following came for everyone to interpret the reasons for interpretation, I hope to help a little bit of it.
Diabetic patients with high blood sugar, glomerular filtration of glucose from the renal tubular glucose reabsorption capacity, resulting in a large amount of glucose dissolved in the urine, while taking away a lot of water, resulting in permeable diuretic. Loss of water causes thirst in diabetic patients.
Diabetic patients drink, polyuria can use the following causal chain to say: elevated blood sugar → urine → urine increased → loss of water → increased osmotic pressure → thirsty → drink more. The more severe diabetes, polydipsia, polyuria symptoms more obvious.
If the diabetics discharge too much urine and can not timely and adequate drinking water, the body dehydration reached 10%, you will feel thirsty, palpitations, fatigue, blood sugar rise; if the water reaches 20%, there will be irritability, Delirium, coma, blood pressure drop, and even life-threatening.
Some elderly patients with diabetes, due to cerebral arteriosclerosis to the hypothalamus thirst center is not sensitive to the body in the water loss, plasma osmolality increased, also feel thirsty. Due to the lack of timely drinking water, permeability of diuresis is still the loss of water, plasma osmotic pressure will be further increased, the patient will appear hyperosmolar coma, manifested as fatigue, loss of appetite, vomiting, severe manifestations of irritability, indifference and even coma, shock.
Therefore, even if diabetic patients usually have to add enough water, should not drink, at least to meet the physiological function of normal water, that is, when thirsty drink some water, for elderly patients are not sensitive to the development of a day to drink Water time, drink on time.
Therefore, the diabetic patients to be correct and to pay attention to the daily drinking water problem, do not think that is usually small things negligence, not to conditioning, this is wrong, and this approach there is a great health risks, and even life-threatening. To remind you, usually drinking water to moderate, do not have to worry about, follow the doctor's advice can be.

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