There is no quick method of defecation, infants three days without stool may be too little water, changes in the pattern of life and other physiological factors, or may be dyspepsia, congenital megacolon and other diseases caused by the need for the cause of the general measures, medication, surgery, etc., to promote fecal excretion. 1. Physiological factors: If an infant has not had a bowel movement for three days, the first thing to consider is that it is due to physiological factors such as drinking too little water and changes in lifestyle, such as the infant’s transition from formula milk to solid food. If this kind of situation occurs, you can increase the amount of water and train the baby to have regular bowel movements, which can promote the discharge of feces. 2. indigestion: the baby three days without stool is also considered to be indigestion. If necessary, need to take medication, can be under the guidance of the doctor oral lactulose oral solution, bacillus subtilis bacillus granules and other drugs to promote gastrointestinal tract peristalsis. 3. Congenital megacolon: infants three days without stool is also considered to be congenital megacolon. The child can use liquid paraffin, corkscrew and other drugs under the guidance of the doctor, stuffed into the anus, or oral lactulose and other laxatives, to promote the improvement of difficult bowel movements. If necessary, enterostomy, radical surgery is required. If the infant appears three days without bowel movement, parents should pay attention to the situation, it is recommended to bring the child to the regular hospital to find out the cause of the disease.