During breastfeeding, pain in the flanks of the breast is considered to be caused by milk stagnation. The patient may also palpate localized masses, which are inflammatory masses formed due to poor milk evacuation and secondary infection, with significant pain and even fever in severe cases. Mild patients can choose local hot compresses and massage, which can make the inflammatory mass gradually subside, and also with oral anti-infective drugs, applying broad-spectrum rosmarinic acid dispersible tablets. During the treatment period, attention must be paid to keeping the milk empty and unobstructed, because during breastfeeding, mastitis can easily occur, as milk is a good culture medium for bacteria. In addition, there is a rupture in the local nipple, which can also easily lead to the invasion of bacteria and is a factor of secondary infection.