Kelly
Tell your mom to change positions very slowly especially from a lying or siting position to standing. Is she taking any medication, if so, check what the side effects are. It is also possible that she may have an inner ear problem that is causing the dizziness. For older people we used to give whiskey twice aday or 3 times aday to increase the circulation. Have you tried giving her some red wine, sometimes that works also. Has she had a blood test to check for anemia. So many thing can contribute to dizziness besides low blood pressure. Is she on a water pill for any heart disease or edema of the feet or legs? If she is not taking a good multi vitamin then she should. Is she eating with good nutrition?