I have a big filling, now have intense facial pain. what do i do?

Mercury filling?: This could be a toxic reaction to mercury amalgam filling if that is what you got. Or it can be an irritation of the nerve in the tooth. Get back to the dentist and perhaps see a mercury free dentist, there are many in texas.

Re-evaluation: There are many reasons why a big filling could cause intense facial pain. The restoration could have either hit or came really close to the nerve, causing the facial pain. High bit after a restoration is placed could also cause this sensitivity. You should go back to determine what the cause of your facial pain is.

Pain location?: If pain at tooth, see dentist, may need root canal. If pain in or near ear, maybe be TMJ. Ask dentist. If TMJ, see TMJ expert. Any dentist can be a TMJ expert with the proper training and experience. Most commonly, oral surgeons, prosthodontists, and orofacial pain specialists. Ask your MD, your dentist and your dental society for referrals.