I have had a white patch on my tongue for at least 6 months. It is in the center of the tongue, and stretches from the middle front to the back. It will not rub off...it is just a white area. I brush it and gargle with Biotene, and occassionally that lessens the appearance, but it always comes back. It is not painful. It seems to get worse after eating certain foods, and sometimes gets a bit brownish in color if I drink coffee. In addition, I have a white coating on the way back part of my tongue that does wipe off, but no bleeding. My doc says tongue coating...that is not painful either. The front part of my tongue hurts occassionally, like it has been burned but it has not. I have geographic tongue, as well. What could be up with the white patch on my tongue? Is it leukoplakia? Thanks for your response.