Final answer:
Conditions in Hyponatremia caused by a GAIN of relatively more water than salt can include water intoxication.
Step-by-step explanation:
Hyponatremia is characterized by a lower-than-normal concentration of sodium in the body, usually due to excess water accumulation. When there is a GAIN of relatively more water than salt, certain conditions can occur. One example is water intoxication, which can be caused by excessive water retention due to renal failure, hypersecretion of ADH, or excessive administration of fluids parenterally. Symptoms of water intoxication include headache, nausea, and muscular weakness.