I've got no experience of induction accupuncture, but I have it regularly for my vomiting in pregnancy.

The needles don't hurt at all. If they are hurting then they are not being done properly or they have put them in the wrong spot. There is a sensation, but it's more of a vibration than pain. I actually find it all quite relaxing and generally fall asleep.

Hope it works out for you!

Fiona