Abdominal pain in a 4-year-old child needs to be highly alert to diseases such as abdominal cold, indigestion and ascariasis. 1. Abdominal cold: 4-year-old children may be wearing too little clothing, coupled with a long period of time in the low temperature of the link, it is easy because of the abdominal cold, so that the gastrointestinal tract peristalsis accelerated, abdominal pain and diarrhea symptoms. 2. Indigestion: 4-year-old children are still relatively young, if at this time do not pay attention to diet, often overeating, may be due to the slowing down of gastric peristalsis, thus dyspepsia, food for a long time to gather in the intestines, so it will produce abdominal pain symptoms. 3. Ascariasis: this is a parasitic disease in the human small intestine or other organs, the incidence of children is higher than normal, usually due to accidental ingestion of infected roundworm eggs such as unwashed vegetables and fruits and so on, will produce abdominal pain, loss of appetite and other related symptoms. Abdominal pain in 4-year-old children may also have other causes, such as intestinal cramps, mesenteric lymphadenitis, etc., so it is necessary to cooperate with the doctor to improve the examination to determine the cause and then do targeted treatment and therapy.