Thrush is a yeast infection that affects the top layers of the lining of the mouth (the oral mucosa). It appears as a white patch on the surface that does not wipe away. If the white patch does wipe off then it is not thrush. Sometimes thrush causes reddened, raw areas. Affected areas may sting or burn when hot or acidic foods are eaten. Thrush infections can occur anywhere in your oral cavity including your gums and tonsils.

Thrush can result from many different reasons:
* It is common in many newborn infants. The newborn becomes infected in the birth canal during the birthing process. Newborns do not have an established immune system to help them fight this infection.
* Those who have been taking antibiotics for a long period of time may develop thrush. The antibiotics will destroy the normal balance of bacteria in your mouth, allowing an overgrowth of yeast.
* A lowered immune system may allow an overgrowth of yeast in those with HIV or other immune disorders.

Anti-fungal drugs are used to treat thrush. Thrush is not contagious. Thrush may be a sign of another medical condition. If thrush occurs it should be evaluated by a dentist or physician as soon as possible. Those who have recurrent thrush due to a chronic condition may take daily drugs to prevent it from reoccurring.

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