Chances are it is because of the cavity in the wisdome tooth.
When you go the dentist more than likely your dentist will not fill it he or she will want to extract it. Take it from it you are better off getting all your wisdom teeth pulled because they will cause you problems and eventually will have to come out. The wisdom teeth serve no purpose. Some people think we need then but we don't we can't chew back that far. But like I said your dentist will tell you to extract the tooth rather than fill it
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