Oral Thrush Adults

Causes of oral thrush

Source: NHS

Low numbers of the fungus Candida are naturally found in the mouth and digestive system of most people. They don't usually cause any problems, but can lead to oral thrush if they multiply.

There are a number of reasons why this may happen, including:

Babies, young children and elderly people are at a particularly high risk of developing oral thrush, as are people with certain underlying conditions, including diabetes, an iron deficiency or vitamin B12 deficiency , an underactive thyroid (hypothyroidism) and HIV .

As most people already have Candida fungi living in their mouth, oral thrush is not contagious. This means it cannot be passed to others.

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