Leukoplakia is a white patch, often inside the mouth, that will not rub off.
Leukoplakia is caused by irritation of a body surface. This surface can be the tongue, lips, skin, genitals, or other places. Over time these areas of irritation may create slightly raised, thickened whitish areas. These are known as leukoplakia.
Repeated, long-term irritation of the surfaces in the mouth is the most common cause of leukoplakia. This may be from:
Other less common causes are inherited conditions and infections.