The downside is that now the arm I got the shot on HURTS. Huuuurts. It's been a while since I've gotten any sort of shot. Ugh.
Depending on the skill of the nurse, it either doesn't hurt at all or is a little sore to sleep on that night. But "hurts" is not an accurate description for it.
I actually surprised a nurse many years ago because they were giving me a tetnus shot, and she walked in and I was like "Uh, so, is this a shot you can give me in my hip instead?" She was like "Uh... yes! Yes. But... I have to go get a different needle. I... nobody EVER asks for me to give them a shot in the butt."
And I told her my logic and she was like "You're absolutely right, but nobody ever thinks that. They all want shots in the arm."
NOPE. LESS PAIN PLEASE.