Thanks for the query to H.C.M. Forum.
As pain is in the local area ( fixed site) so may be due to chondritis
in temporal bone,
Tension ( stress
May be due to sinus
The most important reason may be a tooth ( teeth ) pain due to dental caries
Last reason may be a disease in brain so for get in M R I to rule out any involvement of brain.
Consult one more physician and get his opinion.