donation. 1  an act or instance of presenting something as a gift, grant, or contribution. 2  a gift, as to a fund; contribution.
A black or brown tongue typically is due to the overgrowth of bacteria that normally are present on the tongue. This, too, can be caused by the killing of some bacteria with antibiotics so other bacteria overgrow. But the most common cause of discoloration of the tongue is the overgrowth of a fungus. The most common fungus is called candida. But overgrowth of the candida fungus turns the tongue white. Infection with candida is called candidiasis, and when it happens on the tongue the condition is called thrush.
Thrush, also known as Candida or yeast infection, is a common cause of a white tongue. A pale, white tongue can indicate that a person has a Qi or blood deficiency. In TCM, white is the color of metal and refers to the lungs and colon. This person is probably low on energy.