Differential diagnosis of hypertonic sodium gain are :
-central diabetes insipidus such as head trauma, CNS mass, or idiopathic
-nephrogenic diabetes insipidus such as prolonged urinary tract infection, interstitial nephritis, lithium intake, demeclocycline, hypokalemia, hypercalcemia, congenital
-primary hyperaldosteronism
-salt intoxication
-hypertonic intravenous fluids
-enema
-tube feeds
-central diabetes insipidus such as head trauma, CNS mass, or idiopathic
-nephrogenic diabetes insipidus such as prolonged urinary tract infection, interstitial nephritis, lithium intake, demeclocycline, hypokalemia, hypercalcemia, congenital
-primary hyperaldosteronism
-salt intoxication
-hypertonic intravenous fluids
-enema
-tube feeds