Drink a glass of water
Eat a salty snack
Stand up slowly
Cross your legs while sitting
Tighten your leg and abdominal muscles
Lie down and raise your legs
Avoid sudden position changes
Drink coffee or tea if you normally tolerate caffeine
Wear compression stockings
Eat a small meal if low blood pressure is related to fasting
Take slow deep breaths
Seek medical help if symptoms are severe or persistent