Eleven-month-old baby’s diarrhea may be caused by intestinal flora imbalance, enteritis, irritable bowel syndrome and other reasons. It can be regulated by general treatment and medication. 1. Intestinal flora imbalance: eleven-month-old babies with symptoms of diarrhea may be the cause of intestinal flora imbalance. If the intestinal flora is imbalanced, you can take Bacillus subtilis dictyostelium granules to regulate the intestinal flora and help relieve the symptoms. 2. enteritis: pediatric enteritis may occur when abdominal pain, diarrhea, severe dehydration and electrolyte disorders may occur, oral rehydration salts to prevent dehydration. If rotavirus infection causes enteritis, parents need to adjust the child’s diet, diarrhea is severe can use montelukast to protect the intestinal mucosa. 3. Irritable bowel syndrome: If eleven-month-old babies eat raw and cold food, there may be irritable bowel syndrome, causing diarrhea symptoms. To relieve diarrhea you can avoid eating foods with low temperatures. Also eat a light diet and avoid fatty supplements. Eleven-month-old babies with diarrhea need to be seen in the hospital if the symptoms do not improve with positive lifestyle adjustments. The above medications need to be used in accordance with medical advice.