Hi, I’m a 36 year old male from the UK (saying this for auto mod) and I have a 6 year old son, he just noticed behind is right ear there’s a bony lump. It feels really hard and bone like to touch, and doesn’t give him any pain at all
He doesn’t have it on the other side which has me a bit concerned. He hasn’t been ill at all lately.
Is this common? Thanks for any advice