Both mastitis and breast abscess are benign breast diseases, and most of them are common in breastfeeding women. Non-lactating mastitis is rare and easily ignored. It may also be occured in men. If treatment is delayed or improperly controlled, it could cause severe infection. Non-lactating mastitis is not easy to heal, and it is easy to recur. Patients suffering from this disease usually feel depresion. In this case, a 34-year-old woman with multiple left breast mastitis with abscess formation was treated with traditional chinese medicine. She came to the Breast Tumor Surgery department for treatment with drugs and abscess suction. But the patient had not been cured and was recurrent. She was treated with traditional medicine for seven weeks. Under this treatment of clearing heat and resolving toxins and eliminating the mass and relieving swelling, the wounds around the breast heal gradually. And the patient has not been recurrent for at least seven months. The author hopes that this treatment experience could serve as a reference for taking care of similar cases.