2.2 Common Blood Pressure Questions and Answers
a) Why is my blood pressure reading always different?
Your blood pressure changes constantly. It is quite normal for blood pressure to
fluctuate significantly (50 mmHg to 60 mmHg) throughout the day. Blood pressure
is normally lowest at night, but increases during waking hours when the stress
and activities of everyday life are highest.
mmHg
AM Time PM
40
50
60
70
80
90
100
110
120
130
140
150
160
170
8.00
10.00
12.00
Typical 24 - Hours Rhythm
14.00
16.00
18.00
20.00
22.00
24.00
2.00
4.00
6.00
8.00
systolic blood pressure
diastolic blood pressure
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