Fuel Smell from Car Cap Tank

Hi,
I have a Nissan Sentra, for the last week, I am smelling fuel from the cap of the tank, but there is no smell inside and the engine side only near the cao of the tank?
I don't know what the problem of the this car? Please help me to know?

Welcome to AF.

This forum is for car buying Q&A so I have moved your post to the Nissan Sentra forum.

ummm im not sure i totally understand your problem...your smelling gas from the gas cap? thats normal. if your smelling a lot when the cap is on, you may need to replace the cap or check for leaks in the filler neck.