The female breast has 15 to 20 milk ducts that open into the nipple. Intraductal papilloma is a benign tumor that occurs in the ductal epithelium. Its incidence is second only to fibroadenoma and breast cancer. According to the WHO classification of breast tumors, intraductal papillomas are classified into central and peripheral types, with central papillomas occurring mostly in the grade 1 to 2 milk ducts about 1.5 centimeters below the milk duct jug. They are also known as large intraductal papillomas. They are located in the central region of the breast below the areola and are not thought to increase the risk of breast cancer. Peripheral papillomas are multiple papillomas that occur in the terminal duct – system and have used the name papillomatosis. It is located in the peripheral quadrant of the breast and is generally considered to be a precancerous lesion. The cancer rate is 7 to 15%. Intraductal papillomas are most common in postpartum women, mostly between the ages of 40 and 50, with a gradual rejuvenation of F and many unmarried women. The cause may be related to endocrine disorders of the ovaries. Under the action of estrogen, the epithelium of the breast ducts proliferates into the ducts and grows in a papillary pattern, which is called papilloma. Diagnosis: If you often find nipple overflow, the color is coffee or straw colored, and the brassiere has F overflow A traces, you should be alert, K can touch small lumps at the breast, pressing the lumps can lead to overflow, with the above clinical manifestations should consider the possibility of intraductal papilloma. It is important to go to the mammography department for ductoscopy, ultrasound, and cytology smear of the overflow in a timely manner. At the same time, clinicians should differentiate from breast diseases that produce nipple overflow, such as intraductal papillary carcinoma, ductal dilation of the breast, and cystic hyperplasia of the breast. Treatment: The most effective treatment for intraductal papilloma is surgical excision. If a lump is palpable on clinical examination, the lump and the diseased duct should be surgically removed and sent for examination, pending pathological results. For patients with a preoperative mass that is not palpable, the lesion must be localized preoperatively. My experience is to find the overflow opening before surgery, insert it with a probe first, K and dilate it, and then inject dye. Intraoperatively, we use the orchid-stained area to guide the excision of the lesion and send it for pathology. The scope of surgical excision is reasonable for central papilloma, and recurrence is generally rare. However, recurrence can occur in other ducts of the same breast or in the contralateral breast. For peripheral papilloma, if the surgical excision is not complete, it will easily lead to recurrence of the tumor. The lobe where the lesion is located should be removed and regular postoperative visits must be made. We have learned that in patients with extensive lesions and pathological findings suggesting mild to moderate atypical hyperplasia, prophylactic oral triamcinolone is recommended for 1 to 2 years. For severe atypical hyperplasia, subcutaneous adenomectomy or one-stage prosthesis implantation may be considered.