One year after the filling toothache may be other teeth caries, may also be the filling part of the teeth appeared pulpitis or apical periodontitis. 1. Toothache in other parts: toothache one year after filling may be the other parts of the tooth pain, need to go to the hospital to check the oral teeth, check can be found in other teeth caries, can be found in other teeth with deep cavities, pulpitis and periapical inflammation. 2. toothache at the site of the filling: toothache at the site of the filling may be a tooth with secondary caries deep caries, pulpitis or periapical periodontitis, or it may be a post-endodontic disease after root canal treatment. A year after the filling toothache is recommended to the hospital in a timely manner to check, found that the problem is dealt with in a timely manner.