A stabbing pain in the breast is associated with breast enlargement, breast cysts, acute mastitis and other factors. Most patients experience tingling pain in the breast caused by breast hyperplasia, especially women who have increased hormone levels in their bodies before menstruation, which leads to hyperplasia of the interstitial lobules of the breast and the alveoli of the breast, causing lumps to grow and pinching pains to appear. Breast cysts are a type of breast enlargement that occurs physiologically during the premenstrual period and can lead to disruption of the breast structure due to incomplete replenishment and cause localized pain when hormone levels increase. If a woman experiences pinching pain in the breast during breastfeeding, it can be considered to be caused by acute mastitis. The baby bites the nipple and causes Staphylococcus aureus infection. The bacteria flow up the breast ducts and mix with the milk to form local inflammation, resulting in localized stabbing pain.