A condition that may affect the lining of the mouth and tongue. It is an inflammatory
condition that causes soreness, sensitivity and discomfort. The condition has a variety
of appearances. It is commonly seen as a network of fine white lines on the inside of
the cheeks, often on a reddish background. Less commonly it can appear as white
patches of different sizes and shapes on the tongue or roof of the mouth. Occasionally
the gums can be affected, both with white patches and, sometimes, shiny red sorelooking
gums.