Which blood pressure is right?

Hi there. What articles don't usually mention is that blood pressure varies during the day.
Mine is like 115/75 at bedtime. It is different when I leisurely to watch TV or read; it is of course higher while I work, because of stress.
Which reading would be indicative of a problem, as to whether you have high blood pressure or not?
Thank you in advance.

[RadioAstronomyObserver]

Interesting question!  While going through heart rehab my BP was measured three or four times during that hour every day.  All measurements where round abouts 125/7x.  Once rested my BP's were around 108/7x.
Working was betwen 122 - 130 over 7x (I never remember diastolic's at all) and Resting was between 108-110 over 7x. hence the 125/7x working and 108/7x resting.  Use the average but never state them as absolutes.

  Lowest was 96/xx, but that came from my own automatic BP cuff and had to be a fluke.

[gallicbear]

Thank you for sharing back about the BP average. Guess that would make sense.

[erijon]

The important thing about tracking your blood pressure is to check it one time and one time only at the same time every day. Also, make sure you sit for about 5 mins before you take it.

If I can make a suggestion, try the blood pressure tracker on this site, it's great. Feel free to look at mine by going to my profile, it's a great tool.

Jon