Hyponatremia: Causes, Diagnosis, and Management for the USMLE

Hyponatremia (serum sodium < 135 mEq/L) is the most common electrolyte abnormality seen in hospitalized patients and frequently appears in USMLE Step 1 and Step 2 CK exams. This blog will cover the classification, causes, clinical presentation, diagnosis, and management of hyponatremia, along with KOTC science visuals to enhance retention.