Hand, foot, and mouth disease (HFMD) is a highly contagious viral illness, most common in infants and young children. Parents are generally prepared to deal with fever, rashes, and painful mouth sores, but throwing up with hand foot and mouth often comes as a surprise. So, does hand foot and mouth cause vomiting? In some cases, yes. While vomiting isn't the most well-known symptom, it can be...