Reply To: Can My Teeth Be Killing My Ears? Home › Forums › Decaffeinated Coffee › Can My Teeth Be Killing My Ears? › Reply To: Can My Teeth Be Killing My Ears? February 1, 2011 4:21 am at 4:21 am #734387 GuardmytongueMember If it’s your top teeth halfway back and they kill when you tap them then it’s your sinuses!