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Hand, foot, and mouth disease (HFMD) is caused by viruses from a group called enteroviruses. HFMD is common in infants and children, but can also affect adults. Symptoms can include fever, sore throat, and blistering sores in the mouth that become ulcers. A rash may appear on the palms and soles of the hands and feet.
Learn more about hand foot mouth disease symptoms 1  Â». Hand, foot, and mouth disease is a viral infection. 2  Hand, foot, and mouth disease produces a characteristic rash on the hands, feet, and in the mouth.  Hand, foot, and mouth disease often occurs in the spring and fall.