What is Secondary Hypertension?

Well, hypertension is the term used to describe elevated or high blood pressure that is more than 140/90 mm Hg. There are two types of hypertension – one is primary or essential and the other is secondary. Primary hypertension is more common than secondary and it is due to unknown cause. Hypertension secondary to some other disease or illness like kidney disease etc. is known as secondary hypertension.