If a 2-year-old child has ulcers, the following causes are mainly considered. First, the symptoms are caused by heat accumulation in the spleen and stomach. Heat accumulation in the spleen and stomach often causes ulcers, especially ulcers in the mouth, which often cause bad breath, thick and greasy tongue and dry stools. Secondly, symptoms caused by bacterial infections in children can also cause long ulcers and require the application of cephalosporins against bacterial infections. In addition, children with micronutrient deficiencies, such as zinc and iron deficiencies, can also cause long ulcers, and the ulcers can be recurrent and difficult to heal.