Infantile hand, foot and mouth disease is caused by enterovirus infections, mostly related to coxsackievirus, echovirus, and enterovirus 71, which can cause severe hand, foot and mouth disease, an infectious disease. It can be transmitted through the mouth, respiratory tract and contact, so you need to pay attention to hand hygiene when you have contact with this type of patient to prevent infection with the virus. When infected with HFMD, you can see obvious herpes on the palms of the hands, feet and mouth, mostly accompanied by fever, and the disease can resolve itself after 1-2 weeks in mild infections, but in severe infections, there can be viral myocarditis, pneumonia and viral encephalitis, etc. Once the baby has poor mental performance, you need to go to the hospital promptly.