This occurs when sodium levels decrease acutely in a period of fewer than 48 hours. The low levels cause cerebral edema and brain death. This form of hyponatremia is less common, but symptoms may be significant.
Infusing an intravenous (IV) sodium solution is necessary to correct the imbalance. Additional treatment will depend on the underlying causes. People who do intense physical exercise may drink a lot of water to avoid dehydration. On drinking too much and not replenishing sodium, they may develop acute hyponatremia. Drinking electrolyte replacement fluids may help to keep their sodium levels balanced.
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