Andrew Gabriel wrote :
Yes, they tried reading my blood pressure just before shoving a
camera up where the sun don't shine. Strangley, it was alarmingly
high. Measuring again afterwards found it was normal. They found
this surprising for some reason - I didn't.

I now have three BP monitors and my own measured pressure varies quite
wildly. It seems I can cause the 'white coat syndrome' just taking the
measurements myself. I can take the first measurement, then a second
check within seconds of the first, will find the sys has increased by
20 to 30mmHg.

A big surprise for me, was how my pressure can fall from its usual
values, if I check it directly after even a slight amount of exercise,
such as doing some vacuuming the house, or after having walked 100
yards home from the bus. Measuring it right after a soak in a bath,
produces the lowest readings. I rather expected the opposite effect, a
large increase in pressures measured.