High blood pressure often doesn't have any symptoms, so you usually don't
feel it. For that reason, hypertension is usually diagnosed by a health
care professional during a routine checkup. If you have a close relative
or other risk factors, it is especially important to pay attention
to your blood pressure reading.
If your blood pressure is extremely high, you may have unusually
strong headaches, chest pain, difficulty breathing,
or poor exercise tolerance. If you have any of these symptoms,
seek an evaluation promptly.