The baby’s watery green poop may be caused by cold, gastrointestinal dysfunction or acute gastroenteritis, which needs to be treated by keeping warm, adjusting diet or using medication, etc. The baby’s green poop may be caused by cold, gastrointestinal dysfunction or acute gastroenteritis. 1. Cold: baby watery green stools may be caused by cold, can be treated by keeping warm, hot water bag hot compresses on the abdomen, less food and more meals. 2. Gastrointestinal tract dysfunction: the baby’s watery green poop may also be due to the gastrointestinal tract dysfunction caused by recent improper feeding. It can be treated by adjusting the diet, eating smaller meals, more easily digestible food, and using drugs, such as bifidobacteria, lactobacillus acidophilus and so on to regulate the treatment. 3. Acute gastroenteritis: baby poop watery green stool may also be caused by the baby suffering from acute gastroenteritis. Can be adjusted through the diet, small meals, as well as the use of drugs, such as bacterial infection can be used amoxicillin clavulanate potassium, cefixime and other antibacterial treatment. When the diarrhea is severe, you can use such as montelukast to stop diarrhea. It is recommended that parents once the baby found watery green stool after, timely medical perfect related examination, standardized treatment. The above medication should be used under the guidance of a doctor, do not blindly use drugs.