Plasmacytoid mastitis, called acantholytic canker sores in Chinese medicine, is commonly known as ductitis, or plasmacytosis for short. It is not caused by bacterial infection, but by the accumulation and overflow of fatty material in the ducts, causing chemical irritation and immune response around the ducts, resulting in a large number of plasma cell infiltrates, hence the name plasmacytic mastitis. Repeated episodes and fistulas are formed after rupture, which can be followed by bacterial infections that do not heal for a long time. So it is a special kind of inflammation of the breast. Mastitis may occur with the functional state of the breast and mastitis or a history of breast trauma that destroys the ducts; coupled with the decrease in ovarian function as we age, plasma cell infiltration dominates the inflammation. The clinical characteristics of mastitis: Prevalence age: the disease is most often seen in 30-50 years old non-clinical manifestations: lymph nodes can be enlarged. The clinical manifestations can be roughly divided into three phases. 1 , the overflow phase: nipple overflow is an early manifestation of plasmacytoid mastitis, the overflow is mostly intermittent, spontaneous, and can last for a long time. Patients or doctors often overlook small, intermittent nipple discharge. Some patients have complete or incomplete nipple depression, which is congenital in a significant proportion of patients, and in some patients it occurs gradually after the onset of the disease. 2.Lumpy stage: It often starts suddenly and develops rapidly. The patient feels localized pain and discomfort in the breast, which can be tingling or vague, and a lump is found. The lumps are mostly located under the areola or extend in a certain direction. The lumps are of different sizes and irregular shapes, with a hard and tough texture and a nodular surface with poorly defined borders. The lump may be locally red, swollen and hot, with significant pain, and the redness may extend to 1/4 – 1/2 of the breast. The skin of the breast may be edematous, and some may have cellulite-like changes. Some patients may have a breast lump that is predominantly enlarged for 3 years, 5 years, or longer, but there is no obvious redness or swelling. 3, fistula stage: late breast lump softening, the formation of abscesses, after the breakdown of the pus outflow is often interspersed with acne-like material or grease-like material. The fistula is often formed leading to the breast hole, the wound does not converge for a long time or repeatedly ulcerated, the local tissue is hard and uneven, the nipple is more depressed. Fistulas can be simple or complex. The fistula is mostly located in the areola, but also in the breast, but is ultimately connected to the nipple orifice. The disease can occur in women of any age after puberty and all develop during the non-lactating period. Most patients have congenital total or partial nipple depression. Unilateral onset is common, but there are also cases of bilateral breast onset. The onset of the disease is slow and can last for several months or years. The diagnosis of this disease can be made based on the following aspects. ① The onset of the disease is not during lactation or pregnancy; ② Most patients have congenital total or partial nipple depression; ③ The breast mass starts in the areola, and the mass may be locally red and swollen when suppurating but the systemic inflammatory response is atypical; ④ The abscess is often mixed with powder-like material in the pus after ulceration, and the wound is recurrent and forms a fistula leading to the nipple; ⑤ Mammography, needle aspiration cytology of the mass, and other ancillary tests can help clarify the diagnosis. The diagnosis. It is important to choose the best time for surgery: the inter-episode period, i.e., the wound healing period, is the best time for surgery, but some people think there is no need for surgery when they are well. Some people think they can’t have surgery when they are well, but they wait until they are red and swollen again, and then they delay for a long time. If the wound cannot heal, when the acute inflammation subsides and the wound is most superficial, surgery is possible after this time. The key to successful surgery is to flip the areola, remove the lesion completely, and clean all trauma. The technical key to the surgery is to maintain the perfect shape, necessitating the plastic surgery of the nipple invagination. The treatment depends on the different clinical manifestations, but the main point of the treatment is the surgical removal of the diseased breast ducts for the purpose of complete eradication. In the case of limited masses, the masses can be removed, in the case of abscess formation, an incision is made to drain the pus, and in the case of fistulas, the fistula is removed. In some cases, a unit mastectomy may be considered for most chronic fistulas or severe breast deformities that are too long in duration. The actual diet of plasma cell mastitis prohibits spicy and stimulating foods, such as chili, pepper, fries, fried spicy fava beans, etc. Forbidden to eat greasy and cold food, such as pork fat, frozen watermelon, frozen soda, etc. Drinking strong wine, strong tea, strong coffee and eating curry beef, dog meat, etc. are strictly prohibited. Eat light, easy-to-digest food, such as lean pork, rabbit meat, tofu, soy products, etc. Eat more fresh vegetables, such as bok choy, cucumber, loofah, bitter melon, winter melon, etc. Eat more fresh fruits, such as apples, pears, bananas, watermelon, cantaloupe, etc. Breast disease prevention experts say that plasma cell mastitis diet can also drink red lentil soup, mung bean soup, serving loofah: loofah 1, burn sex, research, boiled with vinegar, brown sugar water delivery.