The first is a local soft tissue infection, especially during breastfeeding, and the nipples are prone to secondary chafing, leading to bacterial invasion and secondary infection, and even severe mastitis, with obvious symptoms of fever. Second, some patients are also caused by breast enlargement, which can lead to breast swelling or nipple pain, and severe breast enlargement, which can also form lumps and nodules that will gradually increase in size, manifesting as pain in the armpit and involving pain in the nipple area. Mammary gland hyperplasia can be diagnosed by ultrasound, and the incidence is very high. For mild mammary gland hyperplasia, you can choose physical therapy methods, which can also improve.