"Nipple trauma" refers to any injury or damage that occurs to the nipple, which is the small protruding part on the chest. This can happen due to different reasons such as breastfeeding problems, friction during sports, or accidents. Full definition
For this same reason, it may also speed healing when nipple trauma is already present. (motherandchildhealth.com)
This type of nipple trauma should be addressed quickly by a lactation consultant. (motherandchildhealth.com)
Some mothers report that the tenderness is worthwhile, as they have found it helps to reduce problems, such as nipple trauma, after the baby is born. (breastfeeding.asn.au)