A 5-month-old baby not pooping for a few days may be related to dietary factors, constipation, intestinal obstruction and other factors, which can be relieved through dietary modification, medication and surgical treatment. 1. dietary factors: the cause of the baby a few days without poop, may be related to long-term bad dietary habits, such as the baby water shortage, milk powder texture is too thick, may affect the gastrointestinal peristalsis and the baby a few days without poop. 5 months as far as possible, breastfeeding, such as artificial feeding needs to be according to the instructions of the milk powder for the brewing, and also need to give the baby more water to supplement the lubrication of the bowel. 2. constipation: is the most common cause of pediatric defecation abnormalities, but the baby drink more water in moderation, clockwise massage of the abdomen, to promote intestinal peristalsis; defecation training; can also be localized use of Keseru or oral lactulose and other medications to assist in defecation. 3. Intestinal obstruction: in addition to the baby does not poop, accompanied by abdominal pain and crying, vomiting, abdominal distension, no anal exhaust and other manifestations, this time the need for timely consultation. Dynamic intestinal obstruction in addition to the treatment of its primary pathology, more conservative treatment, including fasting, gastrointestinal decompression, rehydration, nutritional support, with acupuncture, traditional Chinese medicine and other therapies; mechanical complete intestinal obstruction, especially strangulation intestinal obstruction, must be surgical treatment. 5 months baby a few days without poop may also be other reasons, it is recommended to consult a specialist doctor to determine the assessment, and give targeted treatment or therapy.