9 months old baby stool green, for 9 months old baby normal stool is golden yellow or a little white yellow, thin paste-like stool, in the addition of complementary foods after the occasional stool will have the residue of complementary foods, is normal. 9 months old baby stool green, suggesting that the stool in the intestinal memory for too short a time, that is, the bilirubin inside the stool has not had time to turn into bilirubin, the majority of this situation is due to the child’s cold or some digestive symptoms. This is mostly due to the child being cold or having some indigestion symptoms. The key to treatment is to look at the nature of the stool, that is, in addition to color changes, there is no increase in the number of times, or changes in the nature of the stool, if the child’s stool is only green, there are no other symptoms, you can first give the local abdominal warmth, and adjust the diet. If the child has increased stool frequency or watery stools, oral probiotics, such as Bifidobacterium bifidum or Saccharomyces boulardii, should be given to improve the intestinal flora, or montelukast to alleviate the watery stools, and adjust the stools to a normal state.