By the way, for those who don't know what thrush
is, it is a yeast infection of the mucous membranes of the mouth and tongue. It is caused by a fungus called Candida, which lives in your mouth and is usually kept in check by healthy organisms that also live there. However, when your resistance to infection is low, the fungus can grow, leading to lesions in your mouth and on your tongue. It appears as whitish, velvety lesions in the mouth and on the tongue. It is commonly seen in infants.