High BP is known as the 'hidden killer'. This is because people may have it and not know - no specific effects appear, Then it can suddenly cause stroke or even heart attack.
This is why GP's/nurses, etc always take everyone's BP no matter the reason the patient is attending.
I always felt pretty healthy - and after a very serious illness during my forties resulting in a major operation, was determined never to take loads of pills regularly.
In my sixties, I was went for a normal pre-op check at hospital where I worked for a minor operation. Everything went well until BP - frightingly high. They put me into a small room with a bed and told me to rest for half an hour, then came back and retook it - still very high.
Indeed, they would not let me leave until they actually heard me making an appointment with my GP about this
That appointment started me on BP tabs. Sadly, these actually caused me serious problems with a horrific cough and only after chest consultant at hospital ordered my GP to change this medication did it happen. Took about three months for the old medication completely to leave my system and it took a couple of years to find a combination of pills which really controlled my BP, and gave me no side-effects.
Twenty years later, with the occasional tablet tweak, I take these daily and they do such a good job that I no longer even have 'white coat syndrome'.
Yes, it is a very good idea to do some life-style changes, being overweight, bad diet, too much salt, not enough fluid, will effect your bp. However, unless you are only very slightly high, it is unlikely to bring it down enough to take away that 'hidden killer' concern. Along with medication it will.
When taking your own readings at home, do take three each time, with a few minutes gap between them. Usually they will drop with each reading. Many GP's ask for a weeks or a fortnights twice daily readings, so they have a good record in your files. Do remember NOT to do this shortly after having a meal. Just sit in a chair with your arm resting on a table , relax and starting the machine up. Upper arm machines are more accurate than the wrist ones and do ensure that the wire is placed correctly, The instructions for use are quite straight forward.
It can take a time to find the exact combinations of medications to suit you, so it would be a good idea to continue to take your own readings regularly so that you can keep your GP informed as to how things are going on.
I am nearly 84 now, pretty sure I would not have reached this age without BP medication.