Every time i bend over and stand up i get really lite headed?

Orthostatic: This is termed orthostasis. You should be checked out. Drink plenty of fluids, hold blood pressure medications and see your doctor.

General Health: If you do not have any health issues and are not on any medications, try increasing your intake of water. Drink enough water so that your urine is mostly colorless. Have a healthy diet, exercise, drink plenty of water, have safe sex, Wish you good health!