Possible unknown cohera type implant

Few days ago, I found some pain in the back of my right ear. I don't think I hit or scratched it in my daily activity. One morning, I woke up and felt some pain like from scratch. When I touched it, I felt that part got somewhat less flexible skin. And I also found small bump along the pinna, the outer side of the ear. There is no significant change of my life nor EH from this discovery. First, I thought of Mastoiditis, but there is no huge bump but the scar-type bump along the pinna.