Depends: Depends what you mean by "normal".....Aa lump behind the ear may be a lymph node that is enlarged...That is normal as it is doing its job. If it is infected it will be tender. It may or may not be related to a sharp headache. Your symptoms are best evaluated in a visit with your physician so you can be examined more details obtained. This is hard to answer without seeing you.
Answered 3/11/2018
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