Water loss:
Decreased Intake
Water loss > Na loss
Vomiting<unk> arrhea
Sweating<unk> alysis
Osmotic<unk> uresis
Central<unk> 
Head Trauma
CVA
Tumor
Meningitis
Nephrogenic<unk> 
Thyrotoxicosis
Vomiting<unk> arrhea
Sweating<unk> alysis
Osmotic<unk> uresis
Head Trauma
CVA
Tumor
Meningitis
Sodium gain:
Increased intake
Na intake
NaBicarb
Incorrect preparation of infant formula
Renal Na retention (secondary to poor perfusion)
Na intake
NaBicarb
Incorrect preparation of infant formula
Diabetes insipidus
Water loss:
Dysuria
Decreased Intake
Polyuria
Water loss > Na loss
Acute urinary retention
Vomiting