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Primary Polydipsia
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Overview of Primary Polydipsia 
Primary Polydipsia is also referred to as psychogenic Polydipsia. In these situations no identifiable abnormality can be found in the kidney or in the hypothalamus or pituitary gland. When the individual affected is deprived of water, frequently the response of the kidney and of the brain is normal. However, chronic over ingestion of substantial amounts of water can alter the concentrations of compounds within the kidney that are important for the reabsorption of water. Sometimes, primary Polydipsia may become associated with diabetes insipidus.
Causes of Primary Polydipsia
In a large number of cases of primary Polydipsia, not identifiable cause of the condition can be found. Of the remaining people, psychiatric disorders are common. Other conditions have been seen in association with this including remote head trauma, vitamin A intoxication and sarcoidosis.
Signs and Symptoms of Primary Polydipsia
Since people with normal kidneys are able to excrete large volumes of water, it is difficult to artificially lower the concentrations of electrolytes in the body. Therefore, the symptoms associated with hypernatremia usually do not develop. However, excessive water intake and excessive urinary output usually occur. Unlike diabetes insipidus, the increased water intake and output is decreased during sleep.
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Medical Content Last Updated on 07/12/2008
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