what is considered a dangerously low sodium level
Hyponatremia Hyponatremia is a low sodium level in the blood.[3] It is generally defined as a sodium concentration of less than 135 mmol/L (135 mEq/L), with severe hyponatremia being below 120 mEql/L.[2][7] Symptoms can be absent, mild or severe.[1][8] Mild symptoms include a decreased ability to think, headaches, nausea, and poor balance.[2] Severe symptoms include confusion, seizures, and coma.[1][8]