Last night when I was getting Kayden ready for his bath, I noticed that he had developed a lump on each breast about the size of a marble, but the left was larger than the right. Mike Googled it and found out that it’s completely normal in both male and female babies, though it can be pretty alarming for parents who aren’t expecting it. It’s harmless and seems to be painless, although if it becomes red, pussy, or Kayden becomes feverish, we are to go see the doctor right away. These lumps develop sue to the release of mother’s hormones during late pregnancy and labor. The lumps will disappear within a few weeks.