|In all likelihood he or she missed the vein and it went into the muscle or other tissue. Back when I was still using I was elected to be the only person in our little group of users who was able to actually hit a vein properly in the neck. I don't advise shooting in the neck unless it's the only usable vein left. It's just too easy to screw up and kill someone and guess who takes all the blame if you're injecting heroin into someone else's veins? Hint: It ain't the person receiving the injection.