Tongue has furry yellow skin on the back and middle and has small red dots, not raised, on the tip. When I woke up, patches of skin came painlessly off it. Just got had a perfect check-up at the dentist two weeks ago, have eaten nothing unusual, do not smoke and have no other symptoms other than potentially head ache and sore muscles, neither of which are not ordinary and or unexplained. It has been this way for about 16 hours.