Ok, I shot 5cc of sust in both tri's, which i have done many times before. Most times a little swelling soreness, nothing major. This time my left tricep has swelled up major for about 4 days now. I don't think I have an absces(forgive the spelling) because there is no lumps. Is it possible to tear a vein or something else ? I am on anti-biotics for the flu now so, I figure if it is infected, I should be ok. i am VERY cautious when injecting. i don't even use the same pin when going from one site to another.