Only less painful if there is a loss of sensation, which is a risk with any implant surgery requiring an incision. Over 2k, silicone nipple covers helped a lot with the pressure until it normalized. With more extreme implants, over 5k, there started to be so much compression on the nipples that sensation was replaced with pain any time they were touched out of the bra. This is unfortunately a persistent issue now at 6-7k =(
Dangerous, only if ignoring the pain, or a loss of sensation cuts off blood flow, much as any normal activity.