Blood Pressure

Definition
Hypertension is the term used to describe high blood pressure.

Blood pressure readings are measured in millimeters of mercury (mmHg) and usually given as two numbers. For example, 120 over 80 (written as 120/80 mmHg).

The top number is your systolic pressure, the pressure created when your heart beats. It is considered high if it is consistently over 140.
The bottom number is your diastolic pressure, the pressure inside blood vessels when the heart is at rest. It is considered high if it is consistently over 90.
Either or both of these numbers may be too high.

Pre-hypertension is when your systolic blood pressure is between 120 and 139 or your diastolic blood pressure is between 80 and 89 on multiple readings. If you have pre-hypertension, you are more likely to develop high blood pressure.
Symptoms
Most of the time, there are no symptoms. Symptoms that may occur include:
Chest pain
Confusion
Ear noise or buzzing
Irregular heartbeat
Nosebleed
Tiredness
Vision changes
If you have a severe headache or any of the symptoms above, see your doctor right away. These may be signs of a complication or dangerously high blood pressure called malignant hypertension.