This could mean that you have blown a vein. This is common for arms, plz tell me you use your own needle!!! I have hep C from intravenous drug use, and Im voing thru alot of problems due to this, I dont care what you do or how you do it, keep your own needles and do not ever let someone use yours!!!
HI could be a lot of things but chance are you got an infection get to an E/R and get it checked out this is nothing to mess with most E/R will bill you if you dont have any money
when your ready to kick come on back we have several members that have kicked heroin
good luck to you and God bless.......Gnarly