For HFMD rash after fever, usually no special treatment is needed, just keep the skin and mouth clean, rinse the mouth with saline after meals every day, and apply medication for pain relief if the rash breaks in the mouth. Hand, foot and mouth disease is an infectious disease caused by an enterovirus, which occurs in children. Hand, foot and mouth disease is often accompanied by an acute fever, and a rash will appear after the fever subsides, usually on the hands and feet or mouth: 1. Hair on the hands and feet: dozens of herpes or papules appear, usually without pain or itching, and without scabs and scars. It begins to absorb in about 5 days after its appearance and disappears completely in about 7-10 days. 2. on the mouth: mostly on the buccal mucosa and tongue, followed by the hard jaw and the side of the lips and teeth, and occasionally around the mouth. Initially, it is a red rash, which gradually develops into blisters with a red halo, and the blisters rupture in about 2-5 days. After the rash of hand, foot and mouth fever, attention should be paid to the care of the skin and mouth, the nails of the child should be cut short to avoid unconscious scratching of the child and scratching the rash causing secondary infection. At the same time, avoid eating spicy and irritating foods or foods that are easily allergic to avoid aggravating the rash. If the child has a rash in the mouth, it is advisable to provide a light, thin and soft liquid or semi-liquid diet, and the temperature of the food should not be high.