Intraductal carcinoma of the breast belongs to a common pathological type of carcinoma in situ of the breast, which is caused by abnormal proliferation of epithelial cells in the breast ducts. Intraductal carcinoma of the breast is usually confined to the ducts of the breast, which is in the early stage without infiltration through the basal layer. The cause of this disease is not clear in clinic, and this disease usually has no obvious symptoms in the early stage, and some patients may have nipple discharge, and with the development of the disease, the patients may have lumps and pain in the breast and other symptoms. Intraductal breast cancer is usually treated by surgery, and patients can remove the lesion completely through surgical operation. After the operation, patients should take good care of the lesion to avoid wound infection, and clinical cure can usually be achieved. Intraductal breast cancer should be detected and treated early to avoid aggravation of the condition. If there is any discomfort, consult a doctor in time.