Does alcohol cause your tongue to turn white?

Food debris: Typically it is food and bacterial debris that builds up on your tongue surface. Try cleaning your tongue with either a toothbrush or a tongue scraper. A heavy cottage cheese like coating could be a thrush infection and you need to see your dentist for this.

White tongue: Drinking or gargling? Either way, alcohol can dehydrate your mouth and help promote the formation of white or other color tongue coatings. Having said that, alcohol is a potential carcinogen and best to avoid in rinses or heavy drinking. There are additional causes of tongue coatings as well. See a dentist for a definitive diagnosis and oral hygiene advice.