Children who do not poop for 3 days may be related to intestinal flora dysbiosis, abnormal bowel habits, and disease causes. 1. Dysbiosis of intestinal flora: If the child’s food contains a lot of protein and insufficient carbohydrates, the intestinal flora will change secondary. The fermentation process of intestinal contents is less, the stool is easy to be dry and constipation occurs, so there will be no bowel movement for 3 days. Oral intestinal flora can be regulated by Lactobacillus acidophilus and Bacillus subtilis. 2. Abnormal defecation habits: irregular life, or parents do not give the child to cultivate the correct defecation habits, will lead to defecation does not form a conditioned reflex to make the child constipation. There may also be children who hold their bowels for a long time, which can cause intestinal muscle weakness and functional constipation. 3. Disease causes: for example, intussusception, which is mostly seen in children under 2 years old, is caused by the mesentery into the neighboring intestinal lumen. Intestinal obstruction, abdominal pain and other symptoms, can be manifested as 3 days without defecation. Surgical treatment is required as soon as possible. When a child does not have a bowel movement for 3 days, it is recommended to consult a doctor for further examination, clarify the cause with the help of a doctor, and carry out targeted treatment or therapy. The above medicines need to be used under the guidance of a doctor.