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Hi there,This is Dr Basu, experienced Internal Medicine Specialist.I am here to address your concerns and provide great service.
The excessive sensitivity can be due to the nerve irritation related at the area.
Did you receive any injury at the concerned area?
Denting can be seen normally in most cases without any injury.
In some cases, there can be bone loss or lesion mostly benign--Xrays will detect that well.
However any nerve related problem will not be seen in xrays.Best wishes,It was my pleasure to help you today.If I have answered all your questions, Please rate my response Excellent (click on the 5th star on top).Please bookmark my profile for fast, reliable authentic answers!This is the link to my profile:http://www.justanswer.com/medical/expert-mysticdoc/