TY - JOUR T1 - Acute water intoxication in an adult man: ‘dental hyponatraemia’ revisited JF - Clinical Medicine JO - Clin Med SP - 364 LP - 365 DO - 10.7861/clinmed.2022-0141 VL - 22 IS - 4 AU - Gregor Mayer AU - Petra Müller AU - Barbara Pischinger AU - Eva Seiringer AU - Martin Windpessl Y1 - 2022/07/01 UR - http://www.rcpjournals.org/content/22/4/364.abstract N2 - The differential diagnosis of hyponatraemia is notoriously wide. However, only a minority is acute, ie develops in less than 48 hours. We describe an unusual cause of water intoxication due to toothache. A 30-year-old man with no medical history of note presented in an acute confusional state. Laboratory results disclosed profound hyponatraemia. Urinary indices were consistent with overdrinking, but in the absence of a reliable history, other aetiologies had to be excluded. This case highlights the benefit of a structured approach in the assessment of electrolyte disturbances. ER -