what is the cause of a coated white tongue
Two other common causes of a white tongue are not due to a disease but lifestyle factors. Smoking irritates the lining of the mouth, which can cause it to turn white. This cause of a white coating on the tongue typically goes away once tobacco use is stopped.
Identify oral thrush. Oral thrush is a yeast infection which is a common cause of white tongue. People often get it after taking antibiotics and it is easily treated. You may also have a burning feeling in your tongue and the skin at the corner of your mouth may crack and be painful.