The common reason for sore nipples is the baby’s position on the breast.
For the relief of the pain of a sore nipple
Improve attachment and continue breastfeeding.
You may expose your breasts to air after breastfeeding.
Allow expressed breast milk to dry on the nipple after breastfeeding. (Your milk has antibodies and growth hormones that can fasten the process of skin healing, the healing can take a week or more).
Avoid applying ointments, sprays, powders and soap to nipple .