The main reasons why children get HFMD are the following: First, because children’s immune function is poorer than normal, they are particularly susceptible to viruses and bacterial infections, so they get HFMD. Second, hand, foot and mouth disease is a viral infectious disease of children, it is easy to gather in places, children live in the environment, such as in kindergartens or in elementary school stage, there are often dozens of children, a large number of children to learn, eat, sleep and other environments, will lead to the local spread of the virus, so children will be easy to get hand, foot and mouth disease. Third, children’s immune function is poor, often do not pay attention to hand hygiene, not able to get timely cleaning virus behavior, so it will be easy to get hand, foot and mouth disease.