New Delhi, May 16 -- Hypertension, commonly known as high blood pressure, is a major risk factor for cardiovascular diseases. It affects millions of people worldwide, and most cases of hypertension are classified as primary or essential with have no identifiable cause. However, some people also develop secondary hypertension. It's cause is usually a health condition or a medication you are on. You may have headaches, but it is possible to show no signs at all. That's why it is important to check your blood pressure regularly. On World Hypertension Day, observed on May 17, we tell you all about secondary hypertension.

What is secondary hypertension?

It is high blood pressure that arises as a direct consequence of an underlying, identifia...