Hard to say: Hard to say w/o feeling and seeing it. Could be the mastoid, a normal bump behind the earlobe. Might be you never noticed it before. If it's growing, probably a lymph node and should go down in a few days to weeks. If continues to grow or becomes painful, see a doctor. Probably a benign thing (nothing to worry about).
Answered 6/7/2014
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A doctor has provided 1 answer
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