Hyponatremia vs Hypernatremia Explained | RN Explains 123

What’s the difference between hyponatremia and hypernatremia?

RN Explains 123:

Hyponatremia (Low Sodium):
• Water moves into brain cells
• Causes headache, confusion, seizures

Hypernatremia (High Sodium):
• Water moves out of brain cells
• Causes restlessness, lethargy, coma

⚠️ Both are dangerous — and correction must be slow to avoid brain injury.

💉 Must‑know electrolyte concept
📘 ER, ICU, med‑surg, and nursing students
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