Basically, BC stands for before Christ and AD stands for Anno Domini, Latin for in the year of our Lord.. The transition point between BC and AD marks the approximate time when God incarnate came down to earth to live with His creation.
The only area that is involved is the spot direcly behind my right ear lobe where it sinks in, not futher behind where the gland or lymph node is. I have gotten swollen lymph nodes before, this is very different. My inner ear, and throat and all other surrounding areas aren't in pain at all.
About 2 months ago I found a lump behind my right ear. I have 1 behind my left ear but its much smaller. Mine doesnt hurt either and its fixed, just like a little bone. I went to the doctors but they didnt seem to take me seriously and just gave me antibiotics.