A few years ago a nurse told me my blood pressure was a bit high but I didnt think it was that high to worry about so I never followed up on it. Then a few months ago I went for a dental check up where they checked my blood pressure and after a particularly chaotic morning the nurse told me my blood pressure was 220 over 150, which is crazy high blood pressure The dentist ended the appointment and told me very strongly to go straight to the doctor. When I got there my pressure had gone down to 150 / 90, but the doctor started me on a low dose of blood pressure medicine. It costs $5.00 per month, and who knows what health disaster was awaiting me had I not discovered this.
Even if you are relatively normal weight, in your 20s, and healthy, you could still have issues and not realize it until you have a check up.