Toss on a pack of frozen veggies or ice on the foot. Agrees with Boob about the feet, you should avoid there.
I only IV about 1-2 times per month but the last time I did, I got sick as hell...chills, weakness, feverish, aches, etc. It lasted 10 hours. I'm pretty sure I had CF and it's weird because I am methodical in how I set up (sterile everything, always do a test shot and never shoot alone) I never, EVER want to experience CF again, or that dirty hit.
I've seen people be so unsterile in the process ... Use water that's been around for days, spit, allow someone else to bite filter with their teeth then use it with their shot (yuck), zero hand washing, etc. I know Hep C is spreading like crazy because these fools are drawing off same cotton.
Boob, you know they sell cotton shots around here? Dirty hit city. I've seen people beg for a cotton shot. That's crazy. I'd never use same cotton twice