Well comming from someone who has bruises almost everytime, and has scar tissue beginning to layer on her veins....first let tell you what not to do!!! i am guilty of this, and this is why i scar
DO NOT KEEP POKING!!!!
if you dont get it the 5th time take a serious break like an hour or so, drink fluids, this will help hydrate your veins
if you dont see the blood initially please pleae dont spend more than a minute or two readjusting!!!
Use a fresh needle every time you inject, i saw these crazy pics of a needle under a microscope and what they look like before they are ever poke, what they look like after one poke, and what they look like after thre...wowzaaa seriously
EVERYONE WHO USES DRUGS IV SHOULD SEE THAT PICTURE