I think the trick is injecting properly...which newbies don't always do. I put my first amp into the center of the thigh...where all the nerve endings are...didn't walk for days.
The pain isn't in my head. It's in my left fucking glute! I was too excited to inject properly and now I'm paying for it. I cleaned the area and all that, but I injected WAY too fast. About 5 seconds. That was almost 5 days ago and it still hurts like hell. I did another shot this morning but prepped it first. Ran the syringe under warm water and worked the plunger back and forth to get rid of some of the alcohol and injected slower. About a minute this time. I can barely even tell I've had a shot on that side.
I used to use 21s, but on the advice of some on these boards, I switched to 23Gs (1.5"). They are way easier on your glutes, but they can be a little thin for drawing Winny or Organon Sust.
BTW I only tried injecting TT Winny twice, in each thigh. OOOWWWWW!!! I could barely walk for almost a week. Gonna drink it from now on. Can't go thru that again!!!