Scarring can also be reduced through the use of creams like Hirudoid or Vitamin E. Veins have the ability to reroute themselves, choosing to divert the flow down different veins when veins are scarred and flow rate is reduced. However these veins are often a lot weaker than the ones previous, and can be damaged more easily. Injecting beyond the arms can have dangers, as some of these veins may be very thin, centred close to nerves, or might be confused with arteries. Do not inject under any circumstances, or you will most likely lose the limb. Remove the syringe, elevate the site and apply pressure for at least 30 minutes.
Medical advice is a godd idea.
Sharing needles and syringes is a very effective vehicle for the transmission of viruses passed through blood, like HIV or Hepatitis C, because blood is taken directly from a vein and injected straight into another. In approximately 40 million cases of HIV worldwide, zero are believed to have been transmitted through outdoor needlestick injuries. In appropriate disposal is an environmental nightmare, and creates image problems for users, so doing the right thing with used syringes is important on those levels. If you don't have access to clean equipment seriously consider another route of administration. The stone from smoking is quite nice.