While most white spots in the mouth are harmless, others are serious. For example, a condition known as leukoplakia might require a biopsy in order to check for precancerous cells. Even if you have healthy teeth, this is an important step to take.
Some primary reasons are outlined below:
– A small percentage of leukoplakia cases are associated with precancerous lesions.
– A biopsy performed by your dentist will provide reliable results.
– Even white patches that are painless may indicate a different underlying condition.
“Sometimes a doctor may take a small sample of tissue from oral lesions to diagnose…cells associated with leukoplakia.”
More details are found at this link: