What is a common symptom of acute hyponatremia in humans?

Acute hyponatremia occurs when there is a rapid drop in sodium levels in the blood, typically defined by a serum sodium concentration lower than 135 mEq/L. One of the common and serious symptoms associated with this condition is seizures. This symptom arises due to the effects of low sodium levels on the brain, which can result in cerebral edema, leading to neurological disturbances. As sodium is essential for maintaining the osmotic balance and proper neuronal function, its deficiency can cause excitability of the nervous system, manifesting as seizures.

The occurrence of seizures highlights the need for timely recognition and treatment of acute hyponatremia, as it can lead to significant morbidity. Other symptoms can also present in response to the underlying electrolyte disturbance but may vary considerably among individuals, making seizures a particularly acute and alarming symptom that requires immediate medical attention.