The most common cause of this condition is acute gastrointestinal diseases, such as acute gastritis, acute cholecystitis, gallbladder stones, acute pancreatitis, pyloric obstruction, etc. In addition, food poisoning or eating food containing toxins and irritants can lead to violent vomiting, such as drinking alcohol, violent vomiting, mainly due to the gastrointestinal dynamics of the lack of bile caused by the reflux of the stomach, duodenum, esophagus, through the oral cavity to spit out. If the protruding bile is grass-green in color, it means that the bilirubin in the bile is affected by the action of bacteria or oxidized by stomach acid to appear grass-green in color. If the bile appears red, it is because there is bleeding in the bile duct, mainly caused by inflammation in the bile duct, once bleeding occurs, it is recommended to go to the hospital as soon as possible.