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By Mayo Clinic Staff. Hyponatremia is a condition that occurs when the level of sodium in your blood is abnormally low. Sodium is an electrolyte, and it helps regulate the amount of water that's in and around your cells. In hyponatremia, one or more factors â ranging from an underlying medical condition to drinking too much water during endurance sports â causes the sodium in your body to become diluted. When this happens, your body's water levels rise, and your cells begin to swell. This swelling can cause many health problems, from mild to life-threatening. Hyponatremia treatment is aimed at resolving the underlying condition.
But an extreme salt craving can be a symptom of Addison's disease (a hormonal disorder) or Barrter's syndrome (a rare kidney disorder). If you have too much sodium in your body, you might get very thirsty and urinate more to get rid of the excess.You probably hear about too much sodium, or hypernatremia, much more often than you hear about hyponatremia. But sometimes your kidneys can't eliminate all of the excess.ut an extreme salt craving can be a symptom of Addison's disease (a hormonal disorder) or Barrter's syndrome (a rare kidney disorder). If you have too much sodium in your body, you might get very thirsty and urinate more to get rid of the excess.