Understanding secondary hypertension

Up to 10% of people with high blood pressure have secondary hypertension, which is caused by another condition or disease. The most common of these involve problems with the adrenal glands (hyperaldosteronism), or the arteries supplying the kidneys (renal artery stenosis). People most likely to have secondary hypertension include those with resistant hypertension who use three or more medications to manage their blood pressure, and people who develop hypertension before age 30.