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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.
Early symptoms of hand, foot and mouth disease include a fever and sore throat, followed by sores or blisters in your mouth and on your hands and feet. The incubation period (the time between catching the disease and showing symptoms) is three to five days. During this time, the virus can be passed on.