Lower than average BP is generally a normal healthy variant and is only a problem if you are symptomatic. If you are symptomatic, this could indicate that BP is too low to push blood around the body- your blood pressure would generally need to be a lot lower than this to cause a problem. If for example, your average BP is >140 and it all of a sudden plummets to 90, then this is of course significant. If this is your usual reading (there abouts), then it's nothing to worry about, it's quite healthy. The lower the BP, the lower the stroke risk. Studies support the fact that high blood pressure is a major risk factor for cardiovascular events later in life. This does not necessarily mean you are healthy though. To reduce your chances of developing premature problems, just eat healthily and exercise. Don't smoke and limit alcohol consumption. Forget the rest, go out and have fun.