Most common cause of hypernatremia?
Elderly individuals with reduced thirst and/or diminished access to fluids are at the highest risk of developing hypernatremia. Patients with hypernatremia may rarely have a central defect in hypothalamic osmoreceptor function, with a mixture of both decreased thirst and reduced AVP secretion
Primary hypodipsia
Carcinoid syndrome
Renal losses
Sweating
Fluids and Electrolyte Imbalance