Oral yeast infections or thrush is one of the most common yeast infections. It is caused by a yeast species named candida albicans which is also liable for diaper rash in children and vaginitis in women. Oral yeast infection is very common in infants and young children. In case of children, it is known as oropharyngeal candidiasis.
Normally a small amount of candida yeast lives inside the mouth but can not cause any infection as the immunity system and other microorganisms restrict them. But if this fragile balance is destroyed somehow, then these yeast can overgrow and cause thrush. Stress and some medications like antibiotics may help in the overgrowth.
The most common symptom of oral candidosis is a white, thick creamy patch that is found over a red base inside the mouth mostly on the tongue and inner cheeks. These patches look like curds and can not be removed quite easily. If it is removed with a blade the tissue under it may bleed badly. Thrush may remove the white coating over the tongue and make it look very red. There may be pain inside the mouth and it may make eating very difficult. A person with thrush should be very careful so that he does not get dehydrated.
About 85% of AIDS patients suffer from a similar disease but in that case infection extends through the mouth and esophagus to the stomach. This candida esophagitis may cause ulcers through the gastrointestinal system. It makes swallowing of food too painful. If it is spread to the intestines then the absorption of food becomes difficult. People who have these symptoms are vulnerable to the dehydration.