Plasmacytoid mastitis has been increasing in incidence in recent years and the cause and pathogenesis are not well understood, but overall it is considered to be an immune-related disease, with some patients having a relationship with congenital ductal abnormalities. The lesions of plasmacytitis are diverse, with multiple forms such as masses, abscesses, and sinus tracts that can coexist and heal slowly. Treatment of plasmacytosis is varied. The overall treatment is divided into two categories: surgical treatment and conservative herbal treatment. Surgical treatment varies depending on the stage of the disease and the form of the lesion. For abscesses or liquefied necrosis, puncture and aspiration (closure of the wound, usually requiring more than 2 operations, aesthetic appearance), or incision and drainage (opening of the wound, drainage of the abscess, requiring later cooperation with longer-term drug changes, scarring), or even debridement (removal of necrotic tissue and drainage, opening of the wound, requiring later cooperation with longer-term drug changes, scarring) are possible. For masses or rigid masses (masses left unresolved after the abscess has collapsed), surgical options are available: mass excision, lesion duct excision, segmental excision, super-segmental excision, and even mastectomy. Disadvantages of excisional surgery: there is a certain chance of non-healing of the incision after surgery; recurrence of the mass after surgery and the possibility of repeated surgery; different degrees of breast deformity (including severe deformity); and even breast agenesis. Advantages of excisional surgery: quick healing (usually about two weeks). If the incision does not heal after surgery, or in case of recurrence after surgery, the healing time is prolonged, or another surgery is performed. Another treatment modality: conservative treatment with Chinese herbal medicine (internal herbal medicine, can be combined with external Chinese medicine preparations) is the main treatment. It can also be combined with physical therapy: for example, semiconductor laser treatment can improve the efficacy and shorten the course of the disease. Conservative treatment with Chinese medicine can cure the disease. For abscesses that have broken down, the treatment should be combined with drug exchange. For abscesses or liquefied necrosis, the patient can choose to have the abscess break down on its own, or to have the abscess punctured and drained, or to have the abscess incised and drained, or to have a debridement. Advantages: no or little trauma; good appearance of the breast; low recurrence rate. Disadvantages: relatively long treatment period. Depending on the duration of the disease, the size of the lesion, and individual differences, it can take from 1 week to 9 months, with 4-6 months being the most common.