Acute mastitis is a common surgical condition in lactating women, especially in primiparous women. It has been reported in the literature to affect approximately 50% of primiparous women. It can occur at any time during lactation, but is most common 3 to 4 weeks after delivery, and is therefore also known as puerperal mastitis. The accumulation of milk is an important factor in mastitis because it is conducive to the growth and reproduction of invasive bacteria, which in turn leads to mastitis, usually from the nipple rupture or crack, or directly. In the early stages of the disease, milk stagnation is the main cause, the mother can feel hard nodes in the breast, mild pain, but not accompanied by systemic symptoms. At this time, active and effective lactation treatment can unblock the milk ducts and relieve milk stagnation to promote the inflammation to subside or confine. At the same time, the condition can be relieved quickly without affecting breastfeeding by applying Chinese herbal medicine externally or taking it internally. Improper treatment can lead to increased inflammation and the formation of abscesses, which can result in general symptoms such as chills, high fever, lethargy and poor appetite, a significant increase in breast lumps, red skin and painful refusal to press. Once the abscess is formed, new mothers are in great pain and have to use antibiotics on the one hand and undergo surgical drainage at the same time, which can cause breast deformation due to the destruction of breast tissue and affect breastfeeding. Therefore, early treatment of this disease is very important.