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.
A painless lump behind the ear can be big or small in size, and it can go unnoticed for days or weeks. Essentially, it is an area of swelling that can take place anywhere on the ear. Some people may refer to it as a bump, nodule, tumor, or cyst. Depending on what the cause of the lump behind the ear is, it can be soft or firm. Some people even get multiple painless lumps behind the ear.