What r other symptoms that you r having along with white coated tongue
this condition is usually harmless. White tongue refers to a white covering or coating on your tongue. Your whole tongue might be white, or you could just have white spots or patches on your tongue.
A white tongue is usually nothing to worry about. But on rare occasions, this symptom can warn of a more serious condition like an infection or early cancer. That?s why it?s important to keep an eye on your other symptoms
All of these conditions can cause white tongue:
poor brushing and flossing
dry mouth
breathing through your mouth
dehydration
eating a lot of soft foods
irritation, such as from sharp edges on your teeth or dental instruments
fever
smoking or chewing tobacco
alcohol use.