Odd lump on the back of my right ear?

you may be allergic to your earings i know i had that i was allergic to alot of earings even like silver. or the back maybe too close to the ear and then it causes a lump to come. don't worry it's nothing serious take the earing out, clean it in a mini ear bath lool with some detol disinfectant and it should be ok, no the hole shouldn't go.