Thanks for posting,
What he should do is get his BP checked regularly and if it continuously is high after a couple of weeks then it is most likely he is having hypertension
which will require antihypertensive medication(s) to control it. He should probably reduce his salt intakes (if not already reduced), drink less alcohol, reduce fat intake, exercise more.
It might just be a transitory high blood pressure
that will normalize subsequently and will require nothing extra to be done. The stomach pain might just be a colic
and might not be related to the increased BP.
Hope this clarifies you a little.