Know what you are looking at
The first number describes pressure as the heart pumps; the second describes pressure between beats. Keep both numbers and the measurement date. A useful note might say where you were measured, whether you had rested and whether this was an isolated reading or part of a series. A cropped screenshot without that context is harder to interpret.
Clinic and home thresholds differ
The NHS describes high blood pressure as usually 140/90 mmHg or above when measured by a healthcare professional, or 135/85 mmHg or above at home. These are assessment thresholds, not instructions to start or change medicines. Repeat or ambulatory measurements may be needed. Your clinician sets any personal treatment target.
Make the next check easier
- Ask your pharmacist or practice whether you need a repeat check, a home series or a 24-hour monitor.
- If home monitoring is recommended, ask which monitor and cuff size are suitable and how to use them.
- Take the complete readings and your current medicine list to the review. Include missed doses honestly.
- Agree when the results will be reviewed and whom to contact if you are concerned before then.
Choose a practical habit alongside clinical care
Pick one part of your usual week to improve: compare salt on two foods you often buy, plan a short walk you can repeat, or look honestly at the drinks you have most evenings. Choose something measurable and affordable. Lifestyle changes can help, but feeling fitter or losing weight does not prove your blood pressure is controlled.
Do not wait for a calculator if you are unwell
Sudden persistent chest pain, especially with pain spreading or sweating, sickness or breathlessness, needs emergency help through 999. The NHS advises 111 for other concerning symptoms such as recurring headaches, blurred vision or chest pain that comes and goes. Do not use this page or the Health MOT to decide that serious symptoms are safe.
Keep the medicine decision with your clinician
Record the name and dose you actually take, any difficulties taking it and questions about side effects. Do not stop or adjust prescribed treatment because one reading looks better. At the appointment, ask: what do my readings show, what is the next action, and when do we check again? Leave with those three answers rather than another unexplained number.