Tooth and Mouth Problems

I got a root canal done in 2014. There was no pain all this while however, recently the particular tooth hurts when I tap it with a finger. The pain is there for 2-3 days and then is gone. Again no pain for 10-15 days but after that the pain is back again and goes in 2-3 days. It's a continuous cycle. Please suggest what to do? Also, kindly suggest a painkiller for tooth ache. Is Zeredol SP a good option?

In what cases do veneers (the permanent ones) fall off? Though I know that the permanent ones last for 9 to 10 years only. Can french kissing lead to veneers coming off?

Are teeth bleaching and whitening the same thing?? Does teeth bleaching have any long term side effects? Which one is the best option for making the upper and lower 5 teeth look white? Bleaching OR veneers?

In what circumstances, would the dentist REFUSE to recommend teeth bleaching to as a method of teeth whitening?

I have been having tounge ulcer, I can't speak properly, I felt very pain while I am sleeping and how can reduce my mouth in water.

The bollywood and hollywood actors have perfect set of teeth- straight and shines bright. How can all celebs have such straight and bright white set of teeth?

I feel my front tooth are improperly alligned. Can I have braces. ? What are its side effects??? ...

My right jaw is in very much pain I can't chew food. I have already taken painkillers prescribed by the doctor but still I am in pain. My x-ray shows a little dislocated tmj. Please help me out

I can't chew my food . I have attached the x-ray. I have already taken painkillers as prescribed but when I stop taking painkillers the pain starts again.. please help me out

Pain in cavity, can you please tell some remedy. It's paining alot as the old filling is removed. please help me out