After my recent filling, I am getting pain whenever I bite. Why?

Hi,

Welcome to icliniq.com.

There will be definitely some sensitivity felt after the replacement of old silver fillings to new tooth colored ones. There is a micro shrinkage that happens after the white material is placed into the old and refined cavity. This is the physics behind your sensitivity. Using anti-sensitivity toothpaste like Sensodyne total repair or applying anti-sensitivity gel by the dentist can reduce the problem to a greater extent. The pain that you feel while biting is because the height of the filling is slightly in excess. It has to be corrected by the dentist to get a normal bite, and it helps you get rid of the pain. Hence, I advise you to visit your dentist and get these two things done as a follow-up. Take care.