A "white layer" on the tongue can be obtained by several sources. We call these "white lesions" in dental pathology and it's impossible to determine a specific cause without a visit to your dentist. Most white lesions are symptoms of an underlying systemic condition so you may want to seek out your physician as well. An example of such a condition would be "Thrush", or a Vitamin deficiency. Seek professional help to determine this cause.

Could be food habits. It's normal for some patients, but check with a dentist clinically.

Could be just a food particle or candida. There is a tongue scraper and tongue brush

Possible fungal infection

The white layer resurfacing on your tongue can be due to many reasons. Quality of saliva (dryness of mouth), something you are eating or can be a sign of an infection (Oral Thrush). Please get it looked at by a dentist, it might something small but it can be a sign something bigger.

This can be causes by dry mouth or even due to many crowns you may have. I would start by visiting general dentist firtst or even get a consultation by Oral Surgeon for further tests.

A white layer on the tongue is often a fungus called Candida Albicans. It is present in mouths of 40% of the population but doesn't usually overgrow unless the immune system is compromised.

May have a dry mouth. Not enough saliva or very "thick" saliva. May be lack of water in your body. Drink more water. Try frequent mouth rinses. Brush your tongue. Use a tongue scraper.

Most likely this is a monilial infection or yeast infection caused from virus or slight endocrine imbalance. It is confirmed by scraping and a laboratory microscopic evaluation to determine the actual microbe that needs to be isolated and treated with an antifungal buy prescription.

Bacteria typically form a coating on the tongue. However, if the coating is developing that quickly, see your physician to rule out a yeast infection.