Hi there i have a small lump behind my ear about a inch small i have no pain wats so ever i can move my neck without any pain is this seriouse matter?

Small bump: The bump may be a small lymph node as a result of a URI

Lymph node: It is probably a lymph node. If it is truly an inch in diameter and not tender then I would have your doctor take a look at it to see if it requires a biopsy or if it's just a "reactive" lymph nodes. Reactive nodes are ones that swell up in reaction to infection and they are normal.