Rare symptoms include dizzy spells, headaches, and nosebleeds.
people with chronic high blood pressure might have symptoms such as:
dull headaches dizzy spells frequent nosebleeds
it is usually only when blood pressure spikes suddenly and extremely enough to be considered a medical emergency. This is called a hypertensive crisis.
Hypertensive crisis (usually due to secondary high blood pressure) is defined as a blood pressure reading of 180 or above for the systolic pressure (first number) or 110 or above for the diastolic pressure (second number). If you are checking your own blood pressure and get a reading that high, wait a few minutes and then check again to make sure the first reading was accurate.
Other symptoms of a hypertensive crisis may include:
severe headache severe anxiety shortness of breath nosebleed
After waiting a few minutes, if your second blood pressure reading is still 180 or above, don’t wait to see whether your blood pressure comes down on its own. Call 911 immediately. If that isn’t an option, have someone drive you to the emergency room.
Emergency hypertensive crisis can result in severe complications, including fluid in the lungs, brain swelling or bleeding, a tear in the heart’s main artery, stroke, or seizures for pregnant women with eclampsia.