Green stool, that is, green color of stool, is generally not an early symptom of gastric cancer. Green stool may be related to these reasons: 1, food factor: green food contains a lot of chlorophyll, if you eat too much, the stool will turn green, which will disappear after the green food is digested and discharged; 2, indigestion: when the body has digestive function problems, there will be a lot of acidic substances in the stool, which will oxidize when they meet air, making the stool appear green. Green, then you can eat some drugs to promote digestion, such as morpholine; 3, gastroenteritis: gastroenteritis is a bacterial or viral infection caused by gastrointestinal inflammation, then the stool will also appear green, you can use some anti-infective, anti-inflammatory drugs; 4, drug stimulation: sometimes taking strong antibiotics, certain drugs, supplements, etc. will lead to a large number of beneficial bacteria in the intestinal tract is killed, so that the stool appears green, then You can replace the drug with similar effect. There are many causes of green stool, it is recommended to go to the hospital for a comprehensive examination to accurately find the cause for effective treatment.