First, welcome to YT!
I really don't know what that bump could be. I would just encourage you to take him into the vet if it doesn't go away in a few days or he develops other symptoms. Unless it could be from a flea bite? Then, you might want to go in right away.
Hopefully, someone else will be more help.
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The fullness of our heart is expressed in our eyes, in our touch, in what we write, in what we say, in the way we walk, the way we receive, the way we need. -Mother Teresa (
RIP Gizmo 3/9/07-8/18/12)
