What does low sodium in the body cause?

When the body is mildly hyponatremic, there may be manifestations such as fatigue; when moderately hyponatremic, it may cause gastrointestinal reactions such as nausea and vomiting; and when severely hyponatremic, there may be headache, drowsiness, and easy complication of cerebral edema.
The concentration of serum sodium in the body is 135 to 145 mmol/L. When blood sodium is lower than 135 mmol/L it is called hyponatremia. Sodium ions play an important role in the body to maintain the constancy of blood pressure, the volume of the body, and the function of the heart.
Mild hyponatremia of 130 to 135 mmol/L can be characterized by symptoms such as fatigue and lethargy; moderate hyponatremia of between 125 and 130 mmol/L is characterized by gastrointestinal symptoms such as nausea and vomiting.
Severe low sodium is less than 125mmol / L, there can be headache, drowsiness, easy to complicate cerebral edema, if cerebral edema is further aggravated, can appear brain hernia, respiratory failure, and even death.
The human body low sodium, if accompanied by any discomfort, should promptly seek medical attention, clear diagnosis, so as not to delay the condition.