Another common symptom of potassium deficiency is high blood pressure. Potassium helps keep blood pressure low by neutralizing the effect of sodium. Consuming potassium releases sodium during urination, allowing blood pressure to remain low. Too little potassium interrupts this critical safety mechanism, and sodium can remain in the body, causing blood pressure to rise. When potassium is very low, it can also cause a drop in blood pressure, especially if there are irregularities in heart rhythm due to the deficiency.

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