Iliza Keating

Usually, high blood pressure causes no signs or symptoms. That’s why healthcare providers call it a “silent killer.” You could have high blood pressure for years and not know it. In fact, the World Health Organization estimates that 46% of adults with hypertension don’t know they have it.

When your blood pressure is 180/120 mmHg or higher, you may experience symptoms like headaches, heart palpitations or nosebleeds. Blood pressure this high is a hypertensive crisis that requires immediate medical care.

Your provider will diagnose you with one of two types of high blood pressure:

Primary and secondary high blood pressure (hypertension) can co-exist. For example, a new secondary cause can make blood pressure that’s already high get even higher.

You might also hear about high blood pressure that comes or goes in certain situations. These hypertension types are:

Primary hypertension doesn’t have a single, clear cause. Usually, many factors come together to cause it. Common causes include:

Secondary hypertension has at least one distinct cause that healthcare providers can identify. Common causes of secondary hypertension include:

Researchers believe genes play a role in high blood pressure. If one or more of your close biological family members have high blood pressure, you have an increased risk of developing it, too.

Risk factors that make you more likely to have high blood pressure include:

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