The cause of recurrent mouth ulcers (without fever) may be related to vitamin and trace element deficiencies in the body. These children may have improper feeding methods, such as partial and picky eating, preference for fried and smoked meat, and love for drinks, while not being interested in rice and noodle foods, especially vegetables. For children with recurrent mouth ulcers, the main focus is to establish a healthy lifestyle for the child and to regulate the diet from the dietary aspect. Herbal treatment can also be given on a case-by-case basis, such as for children with obvious symptoms. If it is accompanied by unthinking eating and drinking, a lean body, dry stools and excessive sweating at bedtime, the child belongs to the spleen and stomach Yin deficiency. You can let your child eat some millet and mung bean porridge, oatmeal and lily porridge, corn and lotus root porridge, etc., and change them every day. At the same time, let your child eat milk, eggs, lean meat, fish, soy products and fresh vegetables to meet the body’s needs for protein, various vitamins and trace elements. You should also give your child fruits according to the season, such as apples, peaches, grapes, sugar cane, bananas, watermelon, tomatoes, etc., which can replenish vitamins and nourish stomach yin. But be careful not to eat fried and smoked foods, not to drink drinks containing too much sugar, and avoid spicy and warm foods such as chili, mustard, pepper, dry ginger, mutton, dog meat and fatty meat to avoid damaging the child’s spleen and stomach. If the child has a loss of appetite, a thin body, a pale or yellowish complexion, frequent drooling, weakness and laziness, sweating at the slightest activity, sleepy eyes, loose stools, formed stools and more frequent stools, the child is suffering from a deficiency of spleen and stomach energy. The child should eat japonica yam porridge, japonica rice and red dates porridge, glutinous rice and lentils porridge, lotus seeds and red dates and glutinous rice porridge. You can also eat beef and radish casserole. You can eat some seasonal fruits and dark green, red and yellow vegetables in moderation. Do not eat spicy, hard-to-digest fried and greasy food, cold drinks or frozen food to avoid damage to the child’s spleen and stomach.