There are two causes of poor gastrointestinal: 1. gastrointestinal diseases. 2. gastrointestinal dysfunction. Common clinical gastrointestinal diseases are chronic gastritis, gastric ulcer, colitis, ulcerative colitis and other diseases can cause bad gastrointestinal, and even indigestion causing gastrointestinal dysfunction. And cause gastrointestinal disorders are mainly diet, drugs, mental genetics and other factors. If you eat drugs that stimulate the mucosa of the digestive tract for a long time, it will cause gastrointestinal disorders. Mental stress will affect the absorption function of the stomach, usually excessive drinking, often eat cold or overeating, no regular diet, eating without chewing and swallowing, will destroy the mucosa inside the digestive tract. Poor gastrointestinal and gastrointestinal diseases and gastrointestinal dysfunction are related, usually to protect the gastrointestinal, pay attention to regular diet and rest, relaxed mood.