When is the most accurate measurement during the day?

The best time is after waking up in the morning and before going to bed in the evening. Measurements made at the same time make it easier to observe changes.

The blood pressure in both arms is different. Which one should I use as the standard?

When measuring for the first time, measure both arms and use the higher side as the standard.

My blood pressure reading suddenly increased. Should I seek care right away?

One high reading does not necessarily mean an emergency. Rest for 5 to 10 minutes, then measure again.

How to Measure Blood Pressure Accurately at Home

Proper posture and timing are essential

Before reading this article

I bought a blood pressure monitor, but it can be confusing because the readings are different every time I measure it. Proper posture and timing are important for accurate measurements.

Summary of key concepts

Home blood pressure readings may better reflect your usual blood pressure than readings taken in a clinical setting. They can also help identify “white coat hypertension,” in which anxiety raises blood pressure during clinical visits.

Tips that actually help

Preparation for measurement

**Time**: Within 1 hour after waking up in the morning, before going to bed in the evening
**Rest**: Measured after resting for more than 5 minutes
**Do not**: No caffeine, smoking, or exercise 30 minutes before measurement.

Correct posture

Sit with your back on a chair
Raise your arms at heart level (place them on the table)
Place your legs flat on the floor without crossing them.
Palms facing upwards

Wearing the cuff (arm band)

Middle of forearm, 2~3cm above elbow
Not too loose or too tight (just enough to fit a finger)
Wear directly on the skin (do not wear over clothing)

Run measurements

Press the button and start measuring
Do not talk or move during measurement
Measure twice at 2-3 minute intervals and record the average value

Common mistakes beginners make

**Measurement without backrest**: If you do not lean back, the value will be higher.
**Ignore arm height**: If your arm is lower than your heart, your blood pressure will be measured higher.
**Measure immediately**: Measurement will be inaccurate if measured immediately after activity.
**Measure only once**: Measurements must be made multiple times and averaged to be accurate.

Key Summary

Measured at the same time in the morning/evening
After 5 minutes of rest, return to correct posture
Measure 2~3 times and record the average value
Record the readings in a journal.

Checklist

[ ] Did you avoid caffeine/smoking 30 minutes before the measurement?
[ ] Did you take a break for more than 5 minutes?
[ ] Did you sit with your back against the chair?
[ ] Are your arms at heart level?
[ ] Was the cuff worn correctly?
[ ] Was it measured more than twice?
[ ] Did you record the numbers?

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This article is for general health information purposes only and is not a substitute for medical diagnosis or prescription.