Hyponatremia signs and symptoms may include:
- Nausea and vomiting
- Loss of energy and fatigue
- Restlessness and irritability
- Muscle weakness, spasms or cramps
When to see a doctor
If you have a medical condition that increases your risk of hyponatremia, or you have other risk factors for hyponatremia, such as participating in high-intensity activities, and you have the signs and symptoms of low blood sodium, see your doctor.