What are the symptoms of high potassium levels (hyperkalemia)?

Symptoms of hyperkalemia, or high potassium levels, include muscle weakness, fatigue, nausea, and irregular heart rhythms. Severe hyperkalemia can cause life-threatening complications like cardiac arrest. This condition often occurs due to kidney dysfunction, medications that reduce potassium excretion, or excessive potassium intake. A potassium test is essential to detect and manage hyperkalemia, preventing severe complications.