HFMD is a disease caused by an enterovirus, an infectious disease, and there are more than two dozen enteroviruses that cause HFMD. In adults, because of their strong immune system, if they are infected with HFMD, the symptoms are generally mild and can be characterized by a low fever, malaise, poor appetite, and scattered herpes in the mouth, palms, soles, buttocks, and inner thighs, which are rice-like or mung bean-like in size and may be surrounded by erythema, and generally disappear on their own in 2-4 days without leaving any scars or hyperpigmentation. HFMD symptoms are generally mild, but it is still a contagious disease, so it is important to pay attention to self-isolation after contracting HFMD.