question: I have been back to dentist since she fiilled a rear molar as i have a rotten taste in my mouth and when i press the gum i get a bad smell on my finger tip. I was told that it was nothing so Brush the area well at least twice a day. I have recently been suffering heart palpitations and wondered if there was a possible link? I intend returning to my dentist to insist on a more thorough check up as it is not normal to have such a bad smell or taste in my mouth only a few hours after brushing.