There is a foul smell coming from my toilet. It smells very much like sewage. There are no visible leaks but when I am using the toilet I can hear internal dripping. Anyone know what the problem might be and how to fix it?

I am not an expert on this however I had a situation where when we eliminated all other things we found that the smell was coming from the base of the toilet at the floor, the seal had broken.

You need to remove the toilet and check the wax, may be the wax needs to be replaced, Thanks.

John