Oral thrush (or candidiasis) is a caused by an overgrowth of yeast in the mouth.
The white patches can be scraped off to expose a red surface on the tongue. Illnesses, medications, stress, unbalanced diets (high sugar intake) and antibiotic treatment can cause oral thrush by throwing off the balance of natural bacteria in the mouth.
In many cases, thrush goes away on its own without treatment.
However, a persistent yeast infection may require anti-fungal medications.
These can be taken orally or applied as ointments directly to your mouth. Anti-fungal rinses are another option for treating thrush.
Some home remedies you can try:
1) Gargling with salt water 3 times a day.
2) Gunkii tongue scrape 3 times a day. (the best tongue scraper)
3) Use clove oil and oil pulling.
4) Rinse your mouth with baking soda.
** cover photo borrowed from: https://healthand.com/ca/topic/general-report/thrush