Non-lactating mastitis is a form of mastitis that occurs mainly in women of an age other than lactation, mostly in young women in their thirties after breastfeeding, but also in a small number of cases during lactation. The disease is generally divided into three stages: the lump stage, the abscess stage, and the sinus fistula stage, but also into three stages: acute, subacute, and chronic. Treatment methods, depending on the stage of the disease, are reported to be various, including surgical treatment (lesion excision, mastectomy, debridement, abscess incision and drainage, etc.), catheter infusion and irrigation treatment, and pharmacological treatment: hormones, antibiotics, anti-tuberculosis drugs, and conservative treatment with Chinese medicine. For patients with abscesses, the treatment is combined with puncture and drainage or small incision and drainage to achieve high cure, low recurrence rate, natural shape recovery, avoiding breast deficiency or deformity, non-invasive or minimally invasive treatment, and easy to use, with little impact on family and work. There are different treatments for different types of non-lactating mastitis, and the most appropriate treatment should be determined according to the condition and the patient’s hospital, not blindly.