HFMD does not leave scars, and mild cases of HFMD have a good prognosis with no sequelae. Severe cases can be complicated by encephalitis, myocarditis and other diseases. Hand, foot and mouth disease is an infectious disease caused by enterovirus infection, manifested as pimples and herpes in the oral cavity, hands, feet, buttocks and other parts of the body, the rash is usually no itching, pain, may be accompanied by fever. When lesions appear on the surface of the body, we should pay attention to keep the local clean and dry, avoid scratching and other mechanical injuries, if there is no infection, breakage, etc. in the recovery process, then most of them will not leave a scar. Mild cases of HFMD only show fever and rash, without other systemic complications, and can be cured after 1 week with active treatment, without sequelae. In severe cases, HFMD may involve the nervous system and cardiovascular system, with complications such as encephalitis and myocarditis, or even life-threatening. The existence of hand, foot and mouth disease, should be timely to the regular hospital, and actively cooperate with the doctor treatment, so as not to delay the condition, resulting in adverse consequences.