What should you know about high systolic blood pressure?

A blood pressure reading has a top number, systolic pressure, and a bottom number, diastolic pressure. The top number reflects the surge created by each heartbeat. A single high result can follow pain, stress, caffeine, exercise, or an incorrect cuff position, so it does not by itself establish hypertension.

Persistently raised pressure can make the heart work harder and gradually affect blood vessels, the kidneys, brain, and eyes. It may occur alongside obesity, obstructive sleep apnoea, or chronic kidney disease. Many people have no warning symptoms, which is why properly repeated measurements matter.

Repeat the measurement after sitting quietly, with your back supported, feet on the floor, and your arm resting at heart level. Use a correctly sized upper-arm cuff and avoid talking during the reading. Record the date, time, readings, and anything that may have affected them.

Arrange a clinician review if readings remain high. Bring your record and a list of medicines, supplements, nicotine use, and any decongestants. Treatment may involve lifestyle changes and prescribed medicine, depending on the pattern and your wider health. Do not stop a blood-pressure medicine without advice.

Seek emergency help for a very high reading that persists after a calm repeat, especially with chest pressure, severe breathlessness, fainting, new weakness or numbness, trouble speaking, confusion, or a sudden severe headache. These symptoms can signal a stroke, heart problem, or another emergency.

Without those symptoms, contact a healthcare professional promptly for persistently high readings rather than waiting for symptoms to appear.

Ask whether your readings suggest isolated systolic hypertension, how often to monitor at home, whether another cause or medicine could be contributing, and what target is appropriate for you. Ask how to respond to a high reading and when your treatment should be reviewed.