Does it hurt baby if you touch it? You really don't want to mess with it too much, I would suggest that you take baby to see the doctor, just to make sure that everything is o.k., it could be something like a cyst, and they probably would want to watch it for a while and see what it does. Hope this helps, good luck you you two.
My 5 Weeks Old Baby Has An Round Lump Under The Skin, The Size Of A Bee-bee At The Base Of His Skull, Right Side. What Is It?
Maybe you should take your child to a hospital, or call the doctor and see if it is serious enough to take the baby through emergency. You really should be taking chances with a newborn, there immune systems are very low.