"now, i consider myself someone who has a pretty high pain tolerance. i love needles and piercings and tattoos and have dealt with some pretty severe injuries. i have felt pain. 
the physical insertion was only slightly uncomfortable and lasted only a few seconds. 
however, the cramp i felt after was one of the most painful things i&#039;ve ever experienced. i sat lightheaded, sweating and almost crying in the room for 5 minutes after. i walked out and it was all i could do not to pass out while simply booking my next appointment. 
i went out to my car and turned on max ac and laid my seat back for a good 30 minutes. 
mild cramping next few days. all in all most painful thing ever but only lasts like 45 minutes."