4-year-old baby always say stomach pain may be caused by ascariasis, chronic gastritis and other diseases. 1. Ascariasis: 4-year-old babies can be infected because they like to play in the sand or suck their fingers and other bad hygiene habits, usually, the child has no obvious symptoms, if the infection is serious, abdominal pain around the umbilicus, resulting in children always say tummy ache, and will be accompanied by night terrors, teething and other phenomena. 2. Chronic gastritis: the etiology of the disease is still not completely clear, and Helicobacter pylori infection, bile reflux and other factors related to the onset of the disease, the child will appear recurrent, irregular abdominal pain, resulting in children always say tummy ache, and the pain is often in the process of eating or after meals, the pain site is mostly in the upper abdomen or umbilical cord, and will be accompanied by a lack of appetite, abdominal distension and other symptoms. 4-year-old baby always say stomach pain, there may be other reasons, it is recommended to go to the hospital in time, complete the examination to clarify the cause, under the guidance of the doctor to give targeted treatment or treatment.