Four-month-old babies a month without poop is considered to be congenital megacolon, constipation, etc., need to use general treatment, drug treatment, surgical treatment, etc.. Four months baby a month without poop is already a serious problem, considering the congenital megacolon, constipation, etc., need to give the baby timely enema, taking such as lactulose for treatment, in a short period of time will be discharged from the intestinal tract, so as not to cause obstruction, if necessary, you can use the Keserol, but can not be applied for a long period of time, it is easy to form a dependency. Secondly, probiotics such as Bacillus subtilis bacillus and Lactobacillus acidophilus can be given, which can help regulate the intestinal flora and help discharging the stool, and can also play a certain role in improving the effect of constipation. At the same time of medication, you can massage the child’s abdomen clockwise, which can also play a role in promoting the effect of stool. If the above methods still can not be relieved, can follow the doctor’s instructions for surgical treatment. It is recommended that a four-month-old baby not poop for a month should be timely medical enema to relieve the symptoms, to clarify the cause of constipation, prolonged absence of defecation will have an impact on the child’s health, development. The above drugs need to be used in accordance with medical advice. The need for timely.