HFMD has an incubation period of 3 to 5 days, with low-grade fever, general malaise, abdominal pain, etc. Painful corn to mung bean-sized blisters appear in the mouth, pharynx, soft palate, buccal mucosa, tongue, and gums within 1 to 2 days, surrounded by a red halo that breaks down into a small ulcer, and due to the pain, salivation and refusal to eat often occur. HFMD occurs mainly in children under 4 years of age, but adults can also get it, so it can be said that everyone is susceptible. After infection, only the immunity to that type of virus is acquired, and there is no cross immunity to reinfection with other types of viruses, i.e., after having HFMD, one may also get HFMD again due to infection with other types of viruses. Patients with painful corn to blisters on the tongue and gums are advised to eat light, easy-to-digest foods, protein-rich foods and high-calorie foods, such as: 1. Rice soup Reduce mouth pain when eating. Use a straw to reduce the contact between food and oral mucosa. 2, milk and banana paste Milk provides high quality protein; banana is easy to make paste, rich in carbohydrates, carotene and pectin, can provide heat, vitamins, and laxative. After the fever subsides, the mud and paste food is the main. 3, crushed tofu crushed mushrooms and other options. Excluding milk, eggs and other nutrients, nutritional quality is not enough, the lack of high-quality protein, and antibodies are a protein, so the whole vegetarian is not appropriate.