Those with hyperaldosteronism may need to be checked for a secondary cause as well.

Yes, there is also secondary hyperaldosteronism.

HYPERALDOSTERONISM TIP FOR THE WEEK: Pay attention to high blood pressure mixed with low potassium. Aldosterone regulates the balance of sodium and potassium; too much can lead to an imbalance of high or high normal sodium and low potassium --- leading to fluid retention and sometimes decreased kidney function if not controlled.

I will be posting hyperaldosteronism tips weekly for those needing to be tested or have been tested already for the disease.

Back to secondary hyperaldosteronism --- renal artery stenosis is one cause of this condition. Secondary is when an external force outside the adrenal glands is "encouraging" them to produce too much aldosterone. For more on renal artery stenosis --- I have a community dedicated solely towards that on r/renalarterystenosis. Up to 40 percent of those with undiagnosed or uncontrolled hypertension may have some degree of renovascular narrowing.