Re: Swollen hand after shooting up
^no, if he hit an artery, it would have been extremely painful. plus there is no artery in the hand, under the middle finger. what happened was you missed the hit. Not all of it but some leaked out, you might have blown the vein.
is the swelling bad (goose egg?), is it warm to the touch, is it painful? If not, you're probably okay, just an allergic reaction but if you get any of those symptoms, it can be a sign of an abcess and in that case you'll need to go to a hospital.
For a beginer, the hand is a very bad place to shoot in. The veins are small and delicate. You should try to shoot in the crook of your elbow, those are the easiest to catch. Hand veins are easy to miss or blow out. If you do shoot into them, inject very slowly and pull back on the plunger at least once after you start shooting to make sure you're still in.