Herpes zoster?: Assuming no trauma, this could be an early stage of herpes zoster (shingles) and you should look carefully for red bumps, blisters, etc. However, shingles usually doesn't cross the midline, so "around the back to the other [ear]" is atypical. Still, keep an eye out for the rash. Even if none appears, see your doctor if the pain is severe or continues another 2-3 days.
Answered 8/11/2015
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