I don't think anyone really knows what causes this bleeding. It does clear up spontaneously by about 1 week after birth. You are right--bless the pediatricians who did not worry about the milk going to the baby. The obstetrician is also right. If it goes on for a long time, there should be an investigation, because bleeding from the nipple *occasionally* means cancer. But it is really unusual to have bilateral intraductal papilloma, presenting at the same time, just after birth. I am surprised, though, the obstetrician has not heard of this before. Jack Newman, MD, FRCPC