Transitional movements, such as standing quickly or going from lying down to sitting up, can cause light-headedness due to a drop in your blood pressure (postural hypotension).
Solution: Have a medical professional check the blood pressure (BP) lying down, sitting, then standing, and record if there is a difference. Report this information to the primary physician because some medications can cause a drop in BP or the person may be dehydrated. It is helpful for someone experiencing light-headedness to rest and wait for the dizziness to stop before standing or moving. This will help prevent falls.