Hi,
Noted the history well and understood the concerns.
Mole or removal of mole from the scalp behind ear usually does not cause pains that too after 8 years of surgical removal.
Hence the cause can be ascertained as per the history you have given.
If the pain is localized to the area wherein the surgery was done then this is due to entrapment of the small nerve in the scar tissue which can give the pain as you have well explained.
If the trouble is not much you can carry on without any specific treatment as such.
If the pain is severe and disabling or disturbs you, medications like
Gabapentin,
Amitriptyline can be tried.
If medications fail to give relief then a small surgery to remove the scar and re-stitch the area can help you forever.
Trigeminal neuralgia can not be this much local. But the treatment can be same irrespective of the cause.
Avoid
stress and
anxiety as these can instigate or enhance such pains.
Do not use hard combs.
Hope I have answered your query. Let me know if I can assist you further.
Regards,
Dr. T Chandrakant, ENT & General Surgeon