Constipation is also often found in children with low appetite and poor growth rate. Constipation is seen in various departments such as Gastroenterology, Pediatrics, and Traditional Chinese Medicine, and is often treated as a symptom only, when in reality it is not a simple problem and can keep bothering children and parents for a long time. I bring this issue up so that we can recognize the dangers of constipation, pay enough attention to it, and that early prevention is important. Constipation can be caused by intestinal pathology, but also from diet, mental and habit and other factors. For example, constipation that occurs in infancy is mostly related to improper feeding. Non-breastfeeding, formula-based, and did not pay attention to add beneficial defecation of fiber-rich vegetables and other complementary foods, to early childhood, and paste-like fine soft food as the main food, constipation is more serious. These children are not given the opportunity to chew more residue food exercise often occur vomiting and anorexia and affect the normal growth. Due to frequent constipation or dry stool, it leads to anal fissures or hemorrhoids, so that children are afraid to defecate because of pain and fear; persistent stool will be bad breath, abdominal distension, so that appetite loss. Long-term constipation feces accumulated in the intestine, will ferment a large number of toxic substances, not only affect brain function, hinder the child’s intellectual development, but also seriously affect the child’s mood and attention. Children themselves are prone to internal heat, lack of a reasonable diet, long time to eat fatty, sweet and thick taste and do not eat vegetables and fruits, so that food stagnation in the intestinal tract to generate internal heat, the two heat added, damage the body fluid, the formation of constipation. The basic mechanism of constipation is the imbalance of the large intestine conduction function and the excessive absorption of water in the intestinal cavity, which makes the stool too dry and hard. Measures such as drinking more water, eating bananas and vegetables, using sesame oil and honey for young children, or using milk companions such as probiotics or clearing fire, or performing clockwise massage on the abdomen (twice a day, 5-10 minutes each time) are often recommended by doctors, and are effective for some children, but for stubborn constipation, the effect is minimal. Chinese medicine treatment is based on dialectical treatment and focuses on the combination of treatment and nourishment, which is especially suitable for chronic constipation. It is essential to relieve the child’s fear of defecation and to maintain a soft stool. Behavioral interventions (e.g. encouragement, toilet training, dietary modification, exercise, etc.) may only be effective for some children, and for some children with severe constipation, they can only play a supplementary role, not a curative one. They must be combined with pharmacological treatment. In order to prevent constipation, good bowel habits should be trained from two months of age. The mother should consciously train to defecate regularly according to the child’s condition, and she should make the sound of “NNNN” with him when defecating. If parents do not pay attention to help their children develop good habits at this time, it may also cause constipation. Some children are less active and do not get enough exercise, which can also cause constipation. Older children who stay at home all day playing video games and watching TV may also cause constipation. Parents do not need to be nervous when their children do not have bowel movements for two or three days, in fact, as long as the bowel movements are very smooth, it cannot be considered constipation. Usually encourage children to eat more vegetables, fruits, hydration, diet can also be arranged to eat sesame, walnuts, sweet potatoes, etc., to develop good bowel habits, and gradually let the affected children unconsciously establish a normal physiological defecation mechanism, in order to really improve the problem of constipation. The definition of pediatric constipation is a little different from that of adults. In adults, constipation is defined as having less than 3 bowel movements a week. If a child has a very hard bowel movement, a thick, hard or sheep-like stool, or a painful, crying or bleeding bowel movement, it is considered constipation, regardless of the number of bowel movements. Normal children can have a large difference in the number of bowel movements per day, some can be several times a day, some are once every 3-5 days, as long as the stool has a certain number, not very dry and not thin, and at the same time no discomfort symptoms, are normal. Even if the number of ambassadors is less, but the quality and quantity of stool is not abnormal, and no loss of appetite and other symptoms, can not be considered abnormal. If the stool is dry, the amount is small and difficult to discharge, even if there are 2-3 times a day, but the total amount is significantly less than usual, it should also be regarded as constipation. This is especially true if there is also a decrease in appetite and abdominal distension. If the usual bowel movement is more regular, but suddenly no stool for more than two days, may also be accompanied by abdominal pain or abdominal distension, that should be regarded as constipation, we should promptly find the cause. Newborns should have normal fetal stool 24-36 hours after birth, such as no fetal stool discharge or discharge of a small amount of abnormal fetal stool, are abnormal conditions, should pay attention to the presence of congenital digestive tract anomalies and other diseases. Many intestinal pathologies can lead to constipation or no stool, the common ones are intussusception, various causes of intestinal obstruction, incarcerated hernia and congenital hypertrophic pyloric stenosis. Congenital megacolon is another disease caused by abnormal innervation of the colon. The main manifestation is persistent constipation, no stool for a few days or even a week or more, abdominal distension like a drum with vomiting. Although the child can eat, most of them have poor nutritional status and often have anemia. Once the child has a bowel movement, the volume is very large and the abdominal distension disappears, but it recurs later. In severe cases, constipation occurs during the neonatal period, and no fetal stool occurs within 2-3 days after birth; vomiting and abdominal distention occur, and fetal stool is excreted after enema, but constipation and abdominal distention reappear 1-2 days later. Most of the cases require surgical treatment.