Hey guys, my son is 8 months old and as I was holing him the other day, I felt a very small bony lump on his bottom left rib. If you trace a line from his nipple down to the bottom rib, that's where it's located. I took him to the pediatrician and she said she thinks it's just a ridge where the cartilage meets the bone, however, it's only on the left side. I am a worrier anyway, so I'm still a bit uneasy. Has anyone else found anything like that on their LO? Thanks in advance.