My personal opinion on this is - if you can’t take the pain, you shouldn’t wear the adornment. Set aside things which are clearly surgery, splitting tongues, getting implants, this stuff. But a tattoo doesn’t really hurt that much (not only my opinion, but also that of some friends who are not into pain at all^^)… additionally, many anaesthetics can change the skin a bit, soften it, making it swell up a little, and this might lead to wonky tattoos and piercings.