A baby’s failure to poop for a week is called infantile constipation, which may be due to diet and gastrointestinal underdevelopment, or may be due to a disease, such as congenital megacolon. It is recommended to seek medical attention in time to clarify the cause and then treat it. A, functional constipation: baby a week without poop may be due to the baby’s gastrointestinal function is weak, unreasonable diet or lack of water in the body caused by factors such as constipation. 1, gastrointestinal function is weak: baby’s body growth and development has not been perfect, the peristaltic function of the gastrointestinal tract is poor, often appearing food accumulation in the gastrointestinal tract difficult to discharge. Parents massage the child’s stomach clockwise to promote the peristalsis of the gastrointestinal tract, you can also appropriately give the child some probiotics to adjust the intestinal environment; 2, the diet is not reasonable: if the child’s diet structure of crude fiber content is less and more protein, will also appear constipation symptoms. Parents can appropriately give children to eat more root vegetables, such as celery, spinach, or bananas, apples, pineapples and other fruits that can play a laxative, laxative effect, if the baby is breast-fed, you can appropriately feed the child fresh fruit juice, puree, etc.; 3, lack of water: some babies lose a lot of water when fever or play, but not timely replenishment of water, and usually drink less water, hot climate, etc. Less water, hotter climate, etc. may lead to insufficient water in the intestinal tract, resulting in dry stools, difficult to discharge normally. Parents can give their children to increase the amount of water, more than 1 year old children can also be appropriate application of honey water. Second, congenital giant colon: congenital giant colon baby, after birth can appear fetal stool elimination delay, after the discharge of fetal stool can also appear stubborn constipation, a week or so defecation once, for the temporary inability to carry out surgery, can first conservative treatment, such as enema, the application of lactulose and other drugs to guide diarrhea, in line with the indications for surgery should be timely surgery. When constipation occurs, if the baby is exclusively breastfed, it should stop feeding temporarily and go to the hospital first; if the baby is fed with complementary foods, it can be treated with diet to relieve the symptoms of constipation, and if it is still ineffective, it can be used under the guidance of a doctor, such as corkage and other drugs, or even enema. If your baby has persistent constipation, you should be alert to the possibility of congenital megacolon and should undergo surgery in time.