Primary hyperaldosteronism (PH) is the excessive and uncontrolled production of aldosterone from the adrenal glands. Until now, the disease was frequently discussed among the endocrine causes of secondary hypertension, and patients with particularly resistant hypertension were included in the risk group. However, the data that emerged over the years have changed this perspective. Currently, the incidence of PH among hypertensive patients is more than 20% and it is clear that it affects a much larger population than previously thought. We consider that PH is an important public health problem and should be considered by all physicians dealing with the hypertensive population. In this article, we aim to create a practical approach to the diagnosis of PH from our clinical viewpoint and in the light of the contemporary literature.