There are many gastrointestinal probiotics, the common ones are Bacillus licheniformis, Bacillus subtilis, Bifidobacterium and so on. 1. Bacillus licheniformis: this product has antagonistic effect on staphylococcus and other pathogenic bacteria, and can adjust the dysbiosis, so it can be used for the treatment of acute and chronic enteritis and diarrhea caused by bacteria or fungi. 2. Bacillus subtilis bifidus: this product can directly supplement the normal physiological flora and inhibit pathogenic bacteria, so it can be used for the treatment of diarrhea and constipation caused by intestinal flora imbalance and indigestion. 3. Bifidobacterium: This product can occupy the surface of intestinal mucosa together with other anaerobic bacteria to form a biological barrier to inhibit the growth of pathogenic bacteria, so it can be used for the treatment of intestinal dysfunction caused by intestinal flora imbalance. If you have gastrointestinal symptoms, you need to go to the hospital as soon as possible, the doctor according to the specific conditions, to develop individualized diagnosis and treatment plan, so as not to delay the condition.