What's up freaks, on sat I started my cycle. I got out my box of pins & found a old bottle with about 2cc of sus left. It was about a year old but I figured id use it up. I sucked out 1cc of sus then have brand new 20cc bottle of primo, so I sucked of 1.5cc and hit my shoulder. Smooth & felt normal, very little pain. Went & lifted arms, next day red & I had small fever. Needless to say, Tuesday Dr said celluitis & gave antibiotic. My q's what went wrong? New pin, cleaned shoulder & stopper. The prim was new & good source, the sus I used last year with no problem. Did the sus go bad or what could have caused this???