What is Hypertension

Hypertension is high blood pressure. It's the opposite of hypotension.

What types are there?

There are two types of hypertension:

• Essential hypertension - which is caused by, well, nobody's sure.
• Secondary hypertension - which is caused by something else.

Generally, excluding the second of these (if you'll excuse the pun), is important because it's often incredibly serious (like renal failure or something).