I had several piercing pains in my skull behind my ear last night.  Today, I had a dull pain and the area where the pain was last night has been painful to the touch.  Should I be concerned about Bells Palsy?  I had it four years ago on the other side of my face.
No, not the bells palsy. But yes there has to BA a reason for bells palsy, like chronic mastitis that is an infection in the bone behind the ear that has a lot of air pockets in it, infection in this area may lead to facial nerve damage leading to bells palsy. This type of infection can cause the pain you mentioned in your query,