I have the health visitor coming next week so will also ask her but my newborn has this little hard lump which kinda feels like the bottom of his spine but it sticks out slightly and now has a little white head. It's just above his bum crack.
I asked the community midwife when I first noticed it (pre white head, just looked a little red) and she said she thinks it's just the bottom of his spine but now I'm not so sure?