<unk>  is almost always associated with dehydration due to polyuria (excessive urination), if the condition is prolonged beyond a few hours in those with functioning kidneys.
It is often, and characteristically, found in diabetics, often as one of the initial symptoms, and in those who fail to take their anti-diabetic medications or whose dosages have become inadequate. It is also caused by other conditions featuring osmotic diuresis and by diabetes insipidus ("water diabetes"), and forms part of the differential diagnostic tree for them, as well.<unk>  is also a symptom of atropine or belladonna poisoning. Another cause can be due to medication (such as diuretics) or inadvertent consumption of caffeine. One who drinks nothing but coffee or soda can be easily misdiagnosed by a medical professional as psychogenic<unk> , as they may be unaware they are consuming diuretics.
(In alphabetical order)
Beer potomania
Cushing syndrome
Diabetes insipidus
Nephrogenic diabetes insipidus
Amyloidosis of the kidneys
Amikacin
Amphotericin B
Bardet-Biedl syndrome
Bartter syndrome
Cystinosis
Demeclocycline
Diabetes insipidus, congenital nephrogenic
[Fanconi syndrome]]
Gentamicin
Hypercalcaemia
Hypokalaemia
Interstitial nephritis
Kanamycin
Lithium
Loken Senior syndrome
Medullary cystic renal disease
Multiple myeloma
Netilmicin
Polycystic kidney disease, adult (autosomal dominant)
Proximal renal tubular acidosis
Pyelonephritis, acute
Renal failure, acute
Renal failure, chronic
Sicca syndrome
Sickle cell disease
Urinary tract infection
Central diabetes insipidus
Arteriovenous malformations or aneurysms
Cranial surgery
Craniopharyngioma
Cysts
Cysticercosis, cerebral
DIDMOAD syndrome
Erdheim-Chester disease
Gestational diabetes insipidus
Head injury
Histiocytosis X
Hydrocephalus, obstructive
Hypoxic encephalopathy
Intracranial space-occupying lesion
Leukemia, acute
Meningioma
Meningoencephalitis
Meningitis
Metastatic brain disease
pineal tumors
Pituitary tumor
Post encephalitis status
Radiation therapy
Sarcoidosis
Sheehan syndrome
Sickle cell disease
Skull fracture
Syphilis
Tuberculosis
Tuberculoma of the hypothalamus
Diabetes mellitus type 1 or type 2
Hyperaldosteronism
Hyperglycemia
Hyperthyroidism
Maturity onset diabetes of the young
Medications especially diuretics. see also nephrogenic diabetes insipidus
Bendrofluazide
Bumetanide
Conivaptan
Furosemide
Hydrochlorothiazide
Lithium
Vasopressin
atropine
belladonna poisoning
caffeine
Nephronophthisis
Osmotic diuresis
Diabetes mellitus
Hyperglycaemia
Isosorbide
Mannitol
Sorbitol
Primary hyperparathyroidism
Psychogenic<unk> 
Sicca Syndrome
Water intoxication
Nephrogenic diabetes insipidus
Amyloidosis of the kidneys
Amikacin
Amphotericin B
Bardet-Biedl syndrome
Bartter syndrome
Cystinosis
Demeclocycline
Diabetes insipidus, congenital nephrogenic
[Fanconi syndrome]]
Gentamicin
Hypercalcaemia
Hypokalaemia
Interstitial nephritis
Kanamycin
Lithium
Loken Senior syndrome
Medullary cystic renal disease
Multiple myeloma
Netilmicin
Polycystic kidney disease, adult (autosomal dominant)
Proximal renal tubular acidosis
Pyelonephritis, acute
Renal failure, acute
Renal failure, chronic
Sicca syndrome
Sickle cell disease
Urinary tract infection
Central diabetes insipidus
Arteriovenous malformations or aneurysms
Cranial surgery
Craniopharyngioma
Cysts
Cysticercosis, cerebral
DIDMOAD syndrome
Erdheim-Chester disease
Gestational diabetes insipidus
Head injury
Histiocytosis X
Hydrocephalus, obstructive
Hypoxic encephalopathy
Intracranial space-occupying lesion
Leukemia, acute
Meningioma
Meningoencephalitis
Meningitis
Metastatic brain disease
pineal tumors
Pituitary tumor
Post encephalitis status
Radiation therapy
Sarcoidosis
Sheehan syndrome
Sickle cell disease
Skull fracture
Syphilis
Tuberculosis
Tuberculoma of the hypothalamus
Amyloidosis of the kidneys
Amikacin
Amphotericin B
Bardet-Biedl syndrome
Bartter syndrome
Cystinosis
Demeclocycline
Diabetes insipidus, congenital nephrogenic
[Fanconi syndrome]]
Gentamicin
Hypercalcaemia
Hypokalaemia
Interstitial nephritis
Kanamycin
Lithium
Loken Senior syndrome
Medullary cystic renal disease
Multiple myeloma
Netilmicin
Polycystic kidney disease, adult (autosomal dominant)
Proximal renal tubular acidosis
Pyelonephritis, acute
Renal failure, acute
Renal failure, chronic
Sicca syndrome
Sickle cell disease
Urinary tract infection
Arteriovenous malformations or aneurysms
Cranial surgery
Craniopharyngioma
Cysts
Cysticercosis, cerebral
DIDMOAD syndrome
Erdheim-Chester disease
Gestational diabetes insipidus
Head injury
Histiocytosis X
Hydrocephalus, obstructive
Hypoxic encephalopathy
Intracranial space-occupying lesion
Leukemia, acute
Meningioma
Meningoencephalitis
Meningitis
Metastatic brain disease
pineal tumors
Pituitary tumor
Post encephalitis status
Radiation therapy
Sarcoidosis
Sheehan syndrome
Sickle cell disease
Skull fracture
Syphilis
Tuberculosis
Tuberculoma of the hypothalamus
Bendrofluazide
Bumetanide
Conivaptan
Furosemide
Hydrochlorothiazide
Lithium
Vasopressin
atropine
belladonna poisoning
caffeine
Diabetes mellitus
Hyperglycaemia
Isosorbide
Mannitol
Sorbitol
(By organ system)
Diabetes insipidus, Water intoxication, Hyperthyroidism, Maturity onset diabetes of the young, Diabetes mellitus, Antidiuretic Hormone
Polydipsia causes
Metabolic alkalosis causes
Lactic acidosis causes
Dysuria causes
Oliguria causes
Hyperkalemia causes
Metabolic acidosis causes
Hypokalemia causes