What should you know about borderline hypertension?

One reading does not establish hypertension. Blood pressure can rise temporarily with pain, stress, caffeine, exercise, a full bladder or an incorrectly sized cuff. A clinician may repeat it in the clinic or suggest home monitoring, using a validated device and a consistent technique. The upper and lower numbers both matter, as does the pattern over time.

Persistent high blood pressure can strain blood vessels and organs, including the heart, brain and kidneys. It often causes no obvious symptoms, so feeling well does not confirm that readings are normal.

Arrange follow-up to check technique, review your readings and discuss factors such as salt intake, alcohol, smoking, activity, weight, medicines and sleep. Obesity and obstructive sleep apnoea can affect blood pressure in some people. Do not stop prescribed medicine because a later reading improves. Keep a record with dates, times and symptoms, and take it to your appointment.

Get urgent help for a very high reading accompanied by chest pain, severe breathlessness, weakness on one side, trouble speaking, fainting, confusion or a sudden severe headache. These symptoms can signal conditions such as stroke or heart problems. Without warning symptoms, a borderline reading usually needs planned reassessment rather than panic.

Ask how to measure at home, how often to record readings, and what range should prompt contact. Ask whether kidney checks, medication review or assessment for sleep apnoea is appropriate, and how your overall cardiovascular risk affects the plan.