”The first time I saw the doctor, I had to take a look at it. A month ago, a huge lump suddenly appeared on top of Wang’s left breast, causing vague pain. The next day, Xiao Wang rushed to the hospital near her home for breast ultrasound, mammogram and MRI examinations, which indicated that the lump in her left breast was likely to have breast cancer. After a series of examinations, the doctor diagnosed the same as malignant tumor, and hearing such results, Xiao Wang almost collapsed. Two days later, the biopsy results showed inflammatory lesions and ruled out the possibility of malignancy. Wang was relieved to see the report, but she was exhausted from the days of traveling to major hospitals and the great mental stress of the disease. In addition, the local skin of her left breast lump was red and painful, and thin pus was discharged from the puncture port at times. After many inquiries, Xiao Wang came to our hospital. After examination, it was found that Wang’s left nipple was congenitally sunken, and the mass above her left breast was about 8*150px in size, occupying almost half of her left breast, with a hard texture, and the skin in the central area of about 50px in diameter was red, soft in texture, with fluctuating sensation and obvious tenderness. In addition, the patient had no significant discomfort, and the general examination was not significantly abnormal. The patient reported that before the onset of the disease, she had a slight swelling and pain in both breasts when she was about to have her menstrual period, and she was accidentally hit by her two-year-old son on her left breast. She was diagnosed with non-lactation mastitis by combining the MRI, puncture pathology report and physical examination from an outside hospital. After a period of treatment with internal and external Chinese medicine, local incision and drainage, and wound dressing, the lump basically dissipated and the surgical wound gradually healed. Now Wang is in a much more cheerful mood and continues to take internal Chinese medicine to consolidate her condition. Non-lactating mastitis is called acantholytic canker sores in Chinese medicine and plasmacytic mastitis and granulomatous mastitis in Western medicine. The incidence is about 2.15% to 3.06% of breast diseases, mostly chronic suppurative diseases of the breast during non-lactation or non-pregnancy periods, and is commonly seen in patients with congenital malformations of the nipple. The disease is most often seen in the areola breast with nodules that repeatedly ulcerate and form fistulas, which are difficult to heal over time. It is easily confused with acute mastitis and breast cancer, leading to misdiagnosis and misdiagnosis, so puncture biopsy is considered the main basis for definitive diagnosis. The disease is a complex, long-lasting, recurrent disease for which there is no recognized effective treatment. Once the disease develops, it will be a long treatment process, which often brings great pain and distress to the patient’s body and mind. Therefore, prevention and management are particularly important. According to the clinical history and the observed characteristics of the onset of the disease, patients should pay attention to the following points: 1, relax the mood, avoid excessive fatigue, maintain emotional stability, especially in the premenstrual period. 2, a light diet, avoid spicy stimulation, high fat and thick taste, avoid excessive seafood hair. 3.Protect your breasts, reduce trauma to the breast, avoid wearing tight tops and overly tight bras. Clean your nipples regularly to avoid nipple damage. 4. Actively treat breast diseases such as breast enlargement to reduce the accumulation of milk during the lactation period. Even if the patient has already got the disease, there is no need to worry too much, as this disease is a chronic inflammatory disease and there is no information to prove that it is prone to malignant changes. However, the disease has a long course and is often recurrent, so regular review, active cooperation with treatment, confidence in overcoming the disease, and good habits can quickly cure the disease and prevent its recurrence.