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.
Sinusitis/Sinus infections. The pain in the head that is sharp behind ears or behind eyes can be caused by sinusitis. Amid the varied types of sinusitis, sphenoid sinusitis usually causes pain sharp in the head from behind the eyes while others, such as ethmoid or frontal sinusitis can cause pain behind the eye or ear.