The common causes of children’s stomach pain are improper diet, gastrointestinal infection, functional dyspepsia and so on. 1. Improper diet: if you always eat some spicy, cold and irritating food, it is easy to cause stimulation to the gastric mucosa, which will cause stomach pain. 2. Gastrointestinal infections: mostly seen in viral and bacterial infections, especially Helicobacter pylori infection, which can cause acute and chronic inflammation of the gastrointestinal tract, which in turn causes patients to experience nausea, vomiting, bloating, diarrhea, stomach pain and other symptoms. 3. Functional dyspepsia: closely related to visceral hypersensitivity, local environmental factors in the stomach, and psychosomatic factors, it can cause the patient to always have stomach pain, loss of appetite, bloating, diarrhea and other uncomfortable symptoms. There may be other reasons for the child’s stomach pain, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.