Understanding the Link Between High Potassium and Health

2. Acute Kidney Failure

Unlike chronic kidney disease, acute kidney failure happens suddenly—sometimes within hours or days—and can quickly disrupt the body’s ability to filter waste and balance electrolytes like potassium. When the kidneys abruptly stop working, potassium builds up rapidly in the blood, which can be life-threatening if not treated right away. This condition often occurs in hospitalized or critically ill patients and requires immediate medical attention. Dialysis or other emergency treatments may be necessary to stabilize potassium levels and support kidney function while the cause is addressed.