When women’s nipples bleed out after menopause without pain, it is considered to be caused by intraductal papilloma, breast hyperplasia, ductal dilatation of the breast, breast cancer, etc., and the examination should be further improved accordingly in order to clarify the cause of the disease. 1. Intraductal papilloma: It is a benign tumor that grows in the ducts of the breast. In addition to nipple discharge, the patient can feel a hard lump in the breast without pain. 2. Breast hyperplasia: related to endocrine disorders of patients, cystic breast hyperplasia can lead to yellow-green or brown nipple discharge, and some patients can also have bloody nipple discharge. 3. Dilatation of mammary ducts: it is related to trauma, infection and endocrine disorders of the patient’s breast, and bloody nipple discharge can appear in its early stage without obvious pain. 4. Breast cancer: it is the bloody overflow caused when the lesion of breast cancer invades the ducts of the breast, in the early stage, there can be a painless lump in the nipple, and there can be blood overflow in the nipple, and there is a higher possibility of nipple bloody overflow breast cancer after menopause. Postmenopausal women’s breasts bleed out and painless there are other reasons, it is recommended that the patient timely hospital consultation, improve the auxiliary examination, in order to clarify the cause of the cause of the disease, by a professional physician for the specific cause of the corresponding treatment.