Breastfeeding nipple pain may be related to incorrect breastfeeding posture, cracked nipples, mastitis, breast hyperplasia and other conditions. 1. Incorrect breastfeeding position: If you breastfeed in the wrong position, your toddler may need to suckle hard to get the milk, which will pull on the nipple and cause pain. 2. Cracked nipples: If your toddler bites the nipple when sucking on it, or if the nipple is too dry and cracked, it will cause small cracks on the top of the nipple. This can lead to small cracks on the top of the nipple, which can cause severe pain during breastfeeding as the toddler sucks hard and stimulates the cracks. 3. Mastitis: Mastitis may be caused by milk stagnation, which may not only cause nipple pain and breast lumps, but also fever in severe cases. 4. Mammary gland hyperplasia: If there is mammary gland hyperplasia, the whole breast may have pain, including the nipple, resulting in increased pain during breastfeeding. It is best for breastfeeding women to seek timely medical attention for super sore nipples, actively consult a doctor, and undergo appropriate examination and treatment.