Primary polydipsia

Primary polydipsia
Other names	Psychogenic polydipsia, compulsive drinking, psychosis-intermittent hyponatremia-polydipsia (PIP) syndrome
Patients with PPD often prefer ice cold water
Specialty	Psychiatry
Symptoms	Xerostomia, polydipsia, fluid-seeking behavior
Complications	Water intoxication

Primary polydipsia and psychogenic polydipsia are forms of polydipsia^[1] characterised by excessive fluid intake in the absence of physiological stimuli to drink.^[2] Psychogenic polydipsia caused by psychiatric disorders—oftentimes schizophrenia—is frequently accompanied by the sensation of dry mouth. Some conditions with polydipsia as a symptom are non-psychogenic (e.g., early Type 2 diabetes, primary hyperaldosteronism, and zinc deficiency, and some forms of diabetes insipidus). Primary polydipsia is a diagnosis of exclusion.