Having too little or too much potassium in your blood is dangerous. Having either too little or too much potassium can make you feel tired and weak. Having too much potassium can also cause problems with the way your muscles work and the way your heart beats. It can even cause a heart attack.
High or too low potassium
Having high or too low potassium can make you feel tired and weak
Having too much potassium can cause muscle problems and even a heart attack
The only way to know for sure if your potassium level is normal is to have a blood test. The test measures how much potassium is in your blood.
Your potassium level is normal if it is between 3.7 and 5.2 mEq/L.
Your doctor might use slightly different minimum and maximum numbers. Talk to your doctor about what your own test results mean.