Why do I need a potassium blood test?Your health care provider may order a potassium blood test as part of your regular checkup or to monitor an existing condition such as diabetes or kidney disease. You may also need this test if you have symptoms of having too much or too little potassium.If your potassium levels are too high, your symptoms may include:Irregular heart rhythmsFatigueWeaknessNauseaParalysis in the arms and legsIf your potassium levels are too low, your symptoms may include:Irregular heart rhythmsMuscle crampsTwitchesWeaknessFatigueNauseaConstipation
