Mine didn’t hurt, the worst one was the one on my wrist, had it done on the Sunday, went back to work the Monday and it became a bit swollen, went home for lunch and my mum put a pack of frozen minted peas on it, it was fine after that, and I smelt lovely the rest of the afternoon at work!
Funny enough, the only one of mine that dosen’t seem to raise in 3D effect, is the one on my lower back.