Shit... So that explains the swelling... HahaLol, I hope its a clean out of the shower armpit. That area has a lot of bacteria form sweating.
I take a facecloth and run it under smoking hot water, then wrap the syringe in that for a minute or so.
Lol it just goes between my t-shirt the contents of the syringe and needle stay sterile. My wife's a nurse I got the tip from her.