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.
3. Identify oral thrush. Oral thrush is a yeast infection which is a common cause of white tongue. People often get it after taking antibiotics. 1  You may also have a burning feeling in your tongue and the skin at the corner of your mouth may crack and be painful.tâs a bit of a shock to open your mouth to brush your teeth in the morning and discover that your tongue has a white coating on it. White tongue occurs when the bumps on your tongue swell and trap dead cells, bacteria, and debris between them.