Stuffy Nose, Ears Ringing and Sensitive teeth! I have been dealing with this now for 5 months. I needed a root canal, as my dentist told me that was probably the cause, had it done but I still have the same problems. I was also told that I needed a mouth splint to wear at night due to teeth grinding, so I got one as well, thats not working either! Im just so ready to Scream!!!!!! I cant eat anything thats too hot, too cold, sweet, or salty! And yes, I have used All the sensitive tooth paste out there....... Nothing Works! Can anybody help?