Bump clusters on kittens head

Question
Hi!
We have a litter of 4 kittens that are 8 weeks old. The other day I noticed A small, movable bump an one of their little heads, this 1 lump has now increased to 4 with 2 of them right next to each other. The tops of them are have a slight white crust on them like dry skin. They do not seem to hurt him, and otherwise he seems perfectly healthy. I have closely examined the other kittens and there are no bumps on them anywhere. Can you tell me what this is and what I need to do about it? Thank you very much.
Renee' Stevenson

Answer
Without an examination, I can't be very specific.  At 8 weeks, they should be ready for their forst shot, so the vet can examine them for you and let you know what this is.  If there is an infection on the head, that might explain it growing and spreading.