Oral thrush is seldom a problem for healthy children and adults, although the infection may return even after it's been treated. For people with compromised immune systems, such as from HIV or cancer, however, thrush can be more serious.

If you have a compromised immune system:

  • Thrush is more likely to spread to other parts of your body, including your digestive tract, lungs and liver.
  • You may have especially severe symptoms in your mouth or esophagus, which can make eating painful and difficult.
  • The infection can spread to the intestines, making it difficult to receive adequate nutrition.
Aug. 20, 2011

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