Hand, foot, and mouth disease is one of many infections that cause mouth sores. Health care providers can usually tell the difference between mouth sores caused by hand, foot, and mouth disease and other causes by considering —
- how old the patient is,
- what symptoms the patient has, and
- how the rash and mouth sores look.
Depending on how severe the symptoms are, samples from the throat or stool may be collected and sent to a laboratory to test for the virus.
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