About a year ago, I had high blood pressure (i think about 140/100) and my doctor put me on a low dosage of a drug. I bought a digital machine for measuring my bp at home and was pretty happy when the numbers fell to about an average of 120/70.

A few months later, I had my bp checked at a clinic and was surprised to find that it was back to 140/100. They mentioned white-coat hypertension. But later, I decided to purchase a manual machine (the kind you listen with and watch a dial) and that machine measures 140/90 under conditions in which the digital machine measures 120/70. Interestingly, when my doctor uses a digital machine he also measures lower bps around 130/80.

Are digital machines usually low biased with bp?

Also, if my medicine isnt really lowering my bp, what are some other ways to lower bp?

I am 21, weigh about 150lbs (5'10''), run or bike and lift weights nearly everyday (but am pretty sedentary when not exercising) and my last blood tests were all normal (except for a slight elevation in a hormone called aldosterone?).

Thank you for any responses on either question.