One of the first things you should check on is if there is any insect activity on the plant. Here is an article from Iowa State University that describes the most common insect pests of Burning Bush, and offers some treatment strategies:
Orthostatic hypotension is the drop in blood pressure that occurs when you transition from sitting or lying down to standing. It is common in people of all ages. As the body adjusts to the position change there may be a brief period of dizziness. This is what some people refer to as âseeing starsâ when they get up.
The other answer is correct, but blood pressure does not drop very significantly. This is because the vessels get smaller, and as they get smaller and further away from the heart, the blood pressure remains nearly stable. The reason for this is because when fluids are pushed through smaller vessels, their pressure increases.