One type of mastitis is bacterial infection, which mostly occurs during lactation. Acute mastitis is an acute inflammation of the breast caused by bacterial infection, often forming abscesses within a short period of time, mostly due to invasion of Staphylococcus aureus or streptococcus along the lymphatic vessels. It is most commonly seen in nursing women 2 to 6 weeks after delivery, especially in first-time mothers. The germs generally invade from the nipple rupture or chancre, but can also directly invade to cause infection, although there is a special treatment, but the onset of pain, breast tissue damage caused by breast deformation, affecting breastfeeding. Therefore, the prevention of this disease is more important than the treatment. One type of non-bacterial infectious mastitis, which mostly occurs during non-lactation, is also called plasmacytoid mastitis. Special plasma cell mastitis has various names, such as “chronic mastitis”, “ductal dilatation”, and “acne-like canker sores”. Plasmacytoid mastitis occurs mostly in middle-aged women, but also in adolescent girls, and most patients have nipple invagination. Plasmacytoid mastitis itself is a benign lesion, the cause of which is not known. The clinical manifestations are varied and some of them are sudden and fast moving. Patients experience localized pain and discomfort in the breast and may palpate a lump. The lump is located under the areola or extends into one quadrant. The masses are hard and tough. The surface is nodular, with poorly defined borders and no adhesions to the chest wall. The skin of some breasts is edematous and orange peel-like, and there are usually no systemic symptoms such as fever. The nipples are often edematous and orange peel-like, usually without fever and other systemic symptoms. The nipples often secrete powder-like material with a foul odor. A small number of patients have nipple discharge, which is bloody or watery, and may be accompanied by enlargement of the axillary lymph nodes on the affected side. In the late stage, the lump becomes softened and forms an abscess. When the abscess breaks down, pus mixed with powder-like pus flows out and causes fistulas in the areola, resulting in recurring wounds and scarring, making the nipple sunken and concave. Some patients show prolonged nipple discharge, nipple invagination alone, or localized lumps that do not subside for years. The treatment of plasmacytosis depends on the clinical presentation, but the main point of treatment is the surgical removal of the diseased ducts in order to achieve complete cure. If there is an abscess, then an incision is made to drain the abscess, and if there is a fistula, the fistula is removed. We use a combination of Chinese and Western medicine (oral and external postings) to adjust the drugs to the smallest lesion, the least reaction, with surgery, the root of the disease removed, well. It is a longer treatment period, about one month. Before and after the operation, according to the patient’s condition, the identification and classification, the use of different Chinese medicine to maintain the efficacy of treatment. Comprehensive treatment means that drug treatment is mainly supplemented by physical therapy and external treatment, with the principle of minimal surgical trauma and the goal of one-time cure.