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From Simple English Wikipedia, the free encyclopedia

Polydipsia is excessive thirst or excess drinking. The word derives from the Greek πολυδίψιος (poludípsios) "very thirsty", which is gotten from πολύς (polús, "much, many") + δίψα (dípsa, "thirst"). Polydipsia is a symptom in many diseases. It also occurs as an abnormal behaviour in some animals, such as in birds.[1]


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Polydipsia can be a symptom of diabetes mellitus. It is seen in cases of poorly controlled diabetes. Diabetes insipidus can also cause polydipsia.[1]

Other physiological causes

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It can also be caused by a change in the osmolality of the extracellular fluids of the body, hypokalemia, decreased blood volume, and other conditions that create water deficiency.[1]


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Polydipsia is a symptom and not a disease in itself. Polydipsia investigations at diagnosing diabetes insipidus and diabetes mellitus can be useful.[1]


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  1. 1.0 1.1 1.2 1.3 Hamm, Robert J.; Porter, Joseph H.; Kaempf, George L. (1981). "Stimulus Generalization of Schedule-Induced Polydipsia". Journal of the Experimental Analysis of Behavior. 36 (1): 93–99. doi:10.1901/jeab.1981.36-93. PMC 1333055. PMID 16812235.[permanent dead link]