Why does my iPhone say I have 11 emails and I have none?

How do I get rid of that. When I get a new message it says 12 then when I delete goes back to 11.It's annoying. How to I get it back to 0?

Its nothng.
it is bcos of some virus.

frst thng to do download some useful antivirus in yr phone.

& clear yr spam mssges.
then logout. & couple of minute again login.

hopefully yr problem get solved.