I can not get my LO go stop biting and pulling my nipple!!!! Like ouch!!! This has been going on…

I can not get my LO go stop biting and pulling my nipple!!!! Like ouch!!! This has been going on since he was 1 week old and he is now 6 weeks...he does it after feeding for a bit and will bit and pull and then continue eating and it’s not during a let down or anything and have no idea why he does it 🙄