text: what can cause abnormally low blood pressure? should i be concerned? my nurse was very upset because my blood pressure has been low for almost a year. my doctor just says "its better than it being high. i am confuse as to if i should try to find out why or just let it go. i know i am, diabetic, no thyroid problem, iron count is normal, liver function is normal to. any ideas? so a "normal" bp is 120/80, however, like body temp, peoples blood pressure runs differently. if you can function normally, without dizziness, fainting then your blood pressure is "normal" for you. are you athletic? people who are athletic usually have lower bps than those who are not. was your bp extremely high before? i think you are just fine, and i would have your bp monitored at regular doctor visits, or if you start to feel faint and dizzy