High Sodium Symptoms: Causes, Signs & What to Do
Symptoms of High Sodium can signal deeper health issues. This article explores the symptoms, causes, diagnosis, and management.
April 23, 2026
High sodium levels, or hypernatremia, can result from dehydration, kidney issues, or excess salt intake. Learn what the symptoms mean and how to respond.
What Is Sodium?
Sodium is a critical biomarker in the body. Abnormal levels can indicate issues with metabolic, immune, or organ function. Elevated levels should be assessed in context with symptoms and clinical background.
What Causes High Sodium?
-
Medical conditions affecting balance or organ function
-
Excess dietary intake or supplement use
-
Medication side effects
-
Underlying inflammation or systemic stress
Symptoms of High Sodium
Quick Summary: Symptoms vary based on the root cause but often reflect stress on the body’s systems.
-
Unexplained fatigue
-
Digestive issues or appetite changes
-
Fluid retention or swelling
-
Mood or cognitive changes
How High Sodium Is Diagnosed
Diagnosis typically involves blood, urine, or saliva tests depending on the biomarker. Test results are interpreted in context with clinical symptoms and health history.
Normal Levels
Measure | Normal Range (mmol/L) |
|---|---|
Sodium | 135 – 145 |
How to Lower Sodium Naturally
Quick Summary: Target underlying causes and improve lifestyle foundations.
-
Stay hydrated and eat a balanced diet
-
Manage stress and sleep quality
-
Exercise regularly, as appropriate
-
Work with a clinician to address underlying issues
When to See a Doctor
If high levels persist or symptoms are present, consult a doctor. At MitoHealth, we assess this biomarker alongside other indicators to understand systemic trends related to hydration, inflammation, and stress.
FAQs
-
What causes high sodium? Dehydration, kidney disease, or a high-salt diet are common triggers.
-
Is high sodium dangerous? Yes. It can lead to confusion, seizures, and coma if not corrected.
-
How can I lower sodium levels? Drink more fluids, reduce salt intake, and address underlying conditions.
References
Related Sodium Resources
When to See a Doctor
See a doctor if sodium is below 130 or above 150 mEq/L, or if you experience confusion, seizures, severe headache, or loss of consciousness.
How to Improve Your Levels
Frequently Asked Questions
What causes high sodium?
Low sodium is caused by SIADH, diuretics, heart failure, cirrhosis, and excessive water intake. High sodium results from dehydration, diabetes insipidus, and excessive salt intake.
Is high sodium dangerous?
Severe hyponatremia (below 120 mEq/L) causes seizures and coma. Severe hypernatremia (above 160 mEq/L) causes brain shrinkage and hemorrhage. Both are medical emergencies.
