How to check blood pressure at home: a simple guide for parents

Updated 27 October 2026 · By the Pariwell team

The right way to measure blood pressure with a home BP machine, the mistakes that give wrong numbers, how often to check, and when a reading needs help.

A blood pressure (BP) machine at home shows your parents' doctor how their BP behaves on ordinary days, not just in the clinic, where many people's BP is higher than usual. Home readings are only useful if they are taken the right way, so here is a simple routine your parents can follow.

Choose the right machine

• An automatic machine with a cuff for the upper arm. The American Heart Association advises against wrist and finger machines for most people, because their readings are less reliable.
• A cuff that fits. A cuff that is too small gives readings that are too high. If your parent's arm is thick, buy the large cuff for the same machine.
• Check it once with the doctor. Take the machine to the next visit and compare its reading with the clinic's.

Before measuring

• No tea, coffee, smoking or exercise for 30 minutes before.
• Use the toilet first. A full bladder can push the reading up.
• Sit quietly for 5 minutes: back supported, feet flat on the floor, legs not crossed.

How to measure, step by step

1. Sit at a table and rest the arm on it, so the cuff is at the level of the heart.
2. Put the cuff on bare skin, about two fingers above the bend of the elbow. Not over a sleeve.
3. Press start. Stay still and don't talk until it finishes.
4. Wait one minute and take a second reading. Note both, or send a photo of each.
5. Measure at the same times each day, for example in the morning before medicines and in the evening.

Mistakes that give wrong numbers

• Measuring right after walking, climbing stairs or a hot bath.
• The arm hanging down or held up in the air, instead of resting on a table.
• Talking, moving or checking the phone during the reading.
• Measuring once and worrying about a single high number. One reading is not a diagnosis; the pattern over many days is what matters.

How often to check

Ask your parent's doctor. Many doctors ask for readings in the morning and evening for a week before a visit, or after a change in medicine, and a few times a week once BP is under control.

Keep a record someone actually looks at

A notebook works if someone reads it. Write the date, the time, both numbers and the pulse. Or simply photograph the machine's screen: with Pariwell, your parent sends that photo on WhatsApp, the numbers are read and checked, and the family (and the doctor, if you like) gets one clear report every week or month.

When to call the doctor, and when to get help now

Also tell the doctor if home readings stay above the target they set, or if your parent feels dizzy or faint, especially on standing up. Never stop or change a BP medicine without the doctor's advice, even if the readings look good.