Should I be worried?

[Bemidjikid]

Picture is attached. Been dealing with it for several weeks. I brush,floss and use a tongue scraper twice a day and also use mouth wash. In the morning sometimes my whole tongue has the yellowish color..

 

[Zuri Barniv]

It is not possible to diagnose anything over a forum and using a picture, so nothing will substitute a clinical exam by a dentist or doctor. Saying that, I cannot see anything in the picture that looks out of the ordinary to me. If you have no symptoms at all, then most white or yellowish coatings on the back of the tongue are nothing more than dead bacteria or some fungus which accumulates there, something which is harmless.