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.
Sinuses are also are responsible for the depth and tone of your voice. This explains why you sound like Clint Eastwood when you're all stuffed up. There are eight sinus cavities in total. They are paired, with one of each in the left and right side of the face. Two sinus cavities are in your forehead. Two are behind each cheekbone. Two sinus cavities are within the bones between your eyes. Two are behind each eye.