I have got a fasting blood test tomorrow?

if there is a problem your blood and hair are great helpers for the doctor, all you feel is a little pinch, dont look at it, they stick your wrist or forearm usually because of the large vein there thats easy to get blood from, just eat a good meal a little while before, it takes a few seconds, dont watch because it will hurt more and you'll freak when you see the blood drain, look away