The reason for the baby’s diluted green poop is that the stomach is cold, indigestion, food and medication. 1. Cold: usually the baby’s abdomen is cold intestinal peristalsis will accelerate, the intestinal tract of the stool material is not fully digested, absorption, bile will be discharged with the stool out of the body, the stool green. 2. Indigestion: eating too much, food accumulation, poor digestion will lead to green stools. 3. Reasons of food medication: green vegetables are added in the complementary food. If not fully absorbed, chlorophyll will be excreted through the stool, resulting in green stool. The baby took iron supplements, if not fully absorbed iron, through the stool out of the body, may lead to stool green or even black. There may be other reasons for your baby’s loose green stools, so we recommend that you go to the hospital in a timely manner for a complete examination to determine the cause of the problem, and then give targeted treatment or therapy under the guidance of your doctor.