Mouth ulcers in infants, like those in adults, have an unclear etiology and are self-healing. The main treatment is to relieve symptoms and prevent infection. The occurrence of mouth ulcers is related to many causes, including vitamin deficiencies, consumption of spicy and irritating foods, inflammatory manifestations caused by fire in the mouth, and decreased immune resistance. According to the specific situation, you can supplement multivitamins and minerals medication, you can give your child more water, more vitamin fruits, increase nutrition, enhance immunity resistance. If the above treatment does not improve, and recurrent, it is recommended to actively go to the hospital stomatology examination, to confirm the diagnosis of the specific cause and then the symptomatic treatment. If there is a bacterial infection, you can use anti-inflammatory drugs for oral treatment, clean and wipe the oral mucosa to keep the mouth clean. If there is a fungal infection, usually Candida albicans infection, the performance of thrush, you should use medical baking soda solution to wipe the oral mucosa, with some antifungal drugs to treat. All in all, infant mouth ulcers generally after active drug treatment, clean oral mucosa, regulate the adults and children’s eating habits regular, will soon be healed.