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In the case of a Type 2 Diabetes (Non-Insulin Dependent Diabetes Mellitus - NIDDM) or Prediabetes (Impaired Glucose Tolerance - IGT), the pancreas produces little insulin or the body is unable to use the insulin that is present and therefore the cells cannot use these glucose in the body. Excessive glucose then starts to build up in the bloodstream and the kidney cannot filter all these extra glucose.

Two things will then happen:

Your body will send signals to your brain to drink more water to dilute the blood glucose / sugar levels back to normal.

The "extra" glucose escapes to the urine and thickens it and at the same time draws more water to help it flow through the kidneys. The extra water you drank eventually fills your bladder.

These will cause you to urinate more often and in larger amounts. In the end your body gets dehydrated and makes you feel extremely thirsty.

The cycle continues as your blood glucose / sugar levels are still high, your body will keep thinking you need more water and as you drink more water, you urinate more……a vicious cycle.

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9y ago
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13y ago

The word diabetes means "to go right through" or "to release water". When you have diabetes you void alot of water, (pee alot). Thus, the chronic thirst.

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14y ago

This is a possible sign of high blood sugar.

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Q: Why does thirsty occur with diabetes mellitus?
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Related questions

What are two symptoms of diabetes mellitus?

Diabetes mellitus (aka sugar diabetes) and diabetes insipidus (water diabetes) are totally unrelated, but do carry some of the same symptoms. Common symptoms among patients are extreme thurst and excessive urination.


Which one is hereditary out of Diabetes insipidus and Diabetes mellitus?

Diabetes mellitus.


Meaning of diabetes mellitus?

Diabetes mellitus is an inadequate secretion of insulin, causing blood sugar levels to rise. Excess glucose remains in the nephron creating an osmotic pressure that opposes the norm. Therefore water also remains in the nephron and is not absorbed. -Patients of diabetes mellitus ofen suffer from large amounts of urine and are often thirsty.


Scientific name for diabetes?

The scientific name for diabetes is diabetes mellitus.


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What is the prefix for mellitus?

The prefix for mellitus is "hyper-".


What is the Pathophysiology of type 2 diabetes mellitus?

pathophysiology of diabetes mellitus type 2


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secondary complications of diabetes mellitusSecondary complication of diabetes mellitusDiabetes Mellitus.


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A deficiency in insulin causes type I diabetes mellitus.


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