Click here to see the meaning of the Number 29/11/2 In Tarot Your Expression Number is what you must do. The Number 2 represents Union - the Father-Mother Principle, and so cooperation and association.
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.
Picture from Wikimedia Commons. In some people there may be a brown to black discoloration of the tongue which occurs in patches or streaks. This may be present from birth and is usually not a cause for concern provided that it does not enlarge over time or present with other symptoms.