Are there obvious symptoms when someone is hyponatremic?

How long to gt there: If one develops hyponatremia slowly over weeks, as may occur with use of a diuretic, ther may be no symptoms. The more rapidly it occurs, as well as what is causing it, may cause dizzy, lightheaded, confusion, psychosis, seizures and death. If one finds it as lab finding with no symptoms, a cause should be sought. It could potentially be a serious malady.

Depends on how much: If the hyponatremia is mild (sodium = 130-135 mmol/L) or moderate (125-130), a person *usually* presents with no symptoms. However, if the sodium falls below 120, symptoms may include severe headache, fatigue, and nausea. As the sodium level continues to drop, the risk for seizures and coma gets higher. These symptoms may also appear at higher levels if sodium drops rapidly over a 24-hour period.