Okay since the child is learning to latch its a common problem.
If nipple is sore u can use a Nipple shield to protect the nipple from bite injuries during feeding.
If there is a cut on nipple apply Tbact ointment or express a little breast milk and apply over the cut area it will heal.
Next Steps
continue breast feeding with a nipple shield.
Health Tips
if problem persists see your pediatrician and Obgyn