My 8month daughter has a slight bump on the lower left part of her head,but it feels more like a ball the size of a pea,it doesn't seem to bother her until I touch it. Advise nurse is no help. Any suggestions

It could be a pimple, it could be a cut, it could be a cyst, it could be an insect bite, it could be any number of things.

There's really no way for anyone to tell you what it is without looking at it in person. Your doctor is your best bet. :)