How do i raise my blood pressure?

Low blood pressure: No reason to do so unless passing out or dizziness associated with low blood pressure. If such symptoms, then increasing salt and fluid intake is the first treatment.

Salt and Fluids: Increase your salt intake to >4gm per day and increase your fluid intake to >2l per day. But the real question is: why?! in tribes never exposed to modern civilization, blood pressure remains in the 90s from birth to death. Why are you trying to raise it? 120 is not the goal.