I have a pain behind my right ear, not in my ear, but on the bone behind my ear (top of the neck and bottom of skull).what should i do?

Inflammation: Could be traumatic or musculoskeletal injury or infectious or growth of some sort if no better in a few days , have it evaluated by healthcare professional.

No idea: I cannot figure out what the "none" is behind your ear.Is it the bone, the soft tissue, the muscle? Each answer would have a different cause. Good luck with your none>.

Possible joint pain: Your description sounds as it may be temperomandibular joint pain tmjoint see a periodontist to diagnose it if so then there is very effective treatment to eliminate it.