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.
No such thing exists. The brain has no pain sensation, so you can't have a frontal lobe headache. Headache centered in the right frontal part of the *head* could be a result of many things, ranging from blocked or infected sinuses to cluster headaches to tumors in the skull or brain--that may or may not be in the frontal lobe.