One year old baby diarrhea with mucus, consider bacterial dysentery, fungal enteritis, intussusception, ulcers, dyspepsia and other causes. 1. Bacterial dysentery, the onset of acute, there will be mucus stools, with pus and blood, with a fishy odor, accompanied by nausea, vomiting, abdominal pain and anxious (lower abdominal discomfort, want to defecate, defecation after a sense of incomplete) feeling, stool bacterial culture with Shiga dysentery bacillus growth. 2. Fungal enteritis, mostly due to Candida albicans infection, often accompanied by thrush, increased stool frequency, with mucus, foam, visible tofu dregs-like fine pieces. 3. Intussusception, part of the intestinal tube and mesentery set into the neighboring intestinal lumen caused. About 6~12 hours after the abdominal pain, the stool is jam-like mucus blood stool, mucus for hypoxia and ischemia of the intestinal wall of inflammatory edema secretion increased due to the persistence of unrelieved, intestinal wall necrosis, perforation, peritonitis, for the acute abdomen. 4. rectal ulcers in babies, stools, also with mucus, and with intermittent abdominal pain, proctoscopy can be seen on the ulcerated surface, mostly due to non-infectious factors. 5. indigestion, due to the one-year-old baby’s gastrointestinal tract is relatively delicate, after eating difficult to digest food, it is easy to indigestion, causing diarrhea. After the baby appears mucus stool, should take the child to the hospital in time for treatment.