Drink a glass of water
Lie down and elevate your legs
Eat a salty snack if you are allowed to have salt
Drink a caffeinated beverage if you normally tolerate caffeine
Stand up slowly from sitting or lying positions
Avoid sudden position changes
Wear compression stockings if you have them
Eat small, frequent meals
Avoid alcohol
Rest in a cool place if you feel overheated
Check your blood pressure again after a few minutes
Seek medical help if you have fainting, chest pain, shortness of breath, confusion, or severe weakness