The main source of infection for HFMD is enterovirus, and there are more than 20 types of enterovirus that have been studied, all of which can cause HFMD. Most cases of HFMD are mild and can recover on their own without any sequelae. Only about 2% of patients will develop severe HFMD, which manifests itself in life-threatening conditions such as meningitis, encephalitis, encephalomyelitis and acute pulmonary edema. Mild forms of HFMD only show herpes on the skin of the mouth, palms of the hands, soles of the feet, and buttocks, which usually resolves in 2-4 days without scarring. HFMD is an intestinal infectious disease that can be prevented and treated, and as long as it is detected and treated in a timely manner, it is not life-threatening.