A little pain in the nipple may be caused by nipple inflammation, infection of the ductal opening of the breast, cystic hyperplasia of the breast, cracked nipple and other reasons. 1. Nipple inflammation, the nipple can be seen locally reddish color, swelling, can cause nipple pain, need to do a good job of local cleanliness and hygiene, wash with warm water every day, if necessary, need to take oral antibiotic treatment. 2. Mammary duct opening infection, infection within the nipple opening of the mammary duct can also lead to nipple pain, need to do breast ductoscopy and then do breast duct irrigation, can help relieve the symptoms, usually pay attention to clean the nipple with warm water every day. 3. Breast cystic hyperplasia, as the breast is affected by the hormone level, there is regular proliferation and recuperation, when the hormone level disorders lead to excessive proliferation and incomplete recuperation, then there is pain in the breast and nipple. 4. Cracked nipples, cracked nipples during breastfeeding can also lead to localized pain, usually try not to let the baby long time to contain the nipple. A little pain in the nipple may also be caused by trauma, allergies, tumors, etc. If the above symptoms occur, it is recommended to consult the hospital and standardize the examination and treatment.