Measure your blood pressure; treat to target if it is high
High blood pressure usually has no symptoms. Home readings over several days are more useful than 'I feel fine'.
What the evidence says
A 2016 Lancet meta-analysis of blood-pressure-lowering trials (Ettehad et al.) found that each roughly 10 mmHg drop in systolic pressure was linked to about 20% fewer major cardiovascular events (RR about 0.80), about 27% fewer strokes (RR about 0.73), about 28% less heart failure (RR about 0.72) and about 13% lower all-cause death (RR about 0.87).
Evidence grade: A: randomized trials, meta-analysis. See how we grade evidence.
What to do
Use a validated home monitor and take readings on multiple days. Make decisions about medication together with a clinician. Do not stop prescribed treatment because you feel fine.
Where rules differ
Targets differ slightly between guidelines (ACC/AHA, NICE, ESC). This is not a prescription.