1, late pregnancy nipple bleeding is relatively common, mainly because of late pregnancy breast growth and swelling, in preparation for breastfeeding after delivery, at this time the breast blood supply is very rich, small blood vessels sometimes rupture bleeding into the milk ducts, nipple bleeding…. There is no need to worry, if the bleeding is not much after the birth, it can be left untreated and does not affect breastfeeding. 2, nipple bleeding during pregnancy, in addition to the above reasons, but also pay attention to the existence of breast duct tumor, you can do ultrasound, to understand whether the breast ducts are widened, there is no low echogenicity. If there is, it is recommended not to breastfeed after pregnancy.