Can low blood pressure cause daily frequent two to three second blackouts while sitting?

Possible. When blood pressure is low, sudden changes in position can cause lightheaded ness and dizziness. When changing positions take it slow. If you are on blood pressure medicine then you should see your doctor for medication adjustment. If not on meds, then you should still see you doctor for these issues.

Related Questions

What causes you to get blackouts when you have low blood pressure?

Hypoperfusion. Not enougth circulation can cause poor perfusion of the brain and this cause a temporary blackout. Staying flat is usually enough to reverse it. Read more...

Why do you get blackouts sometimes when you have low blood pressure?

Blood flow to brain! If your blood pressure is too low, you can experience "blackouts, " usually short lived, because of diminished blood flow to the brain, causing hypoxia. Read more...