How is HFMD diagnosed?
Usually, the physician can distinguish between HFMD and other causes of mouth sores based on the age of the patient, the pattern of symptoms, and the appearance of the rash and sores on examination. A throat swab or stool specimen may be sent to a laboratory to determine which virus caused the illness; however, these tests usually take 2 to 4 weeks to obtain a final answer, so the physician usually does not order them.
