Black fungus will fart after eating, may be fungus contains dietary fiber and other physiological factors, may also be the patient itself there is chronic gastritis, ulcerative colitis and other pathological factors caused. 1. Physiological factors: fungus is rich in dietary fiber, pectin and other substances, after absorbing water can increase gastrointestinal capacity, causing bloating, farting, belching and other indigestion; consumption of a large number of fungus can cause intestinal peristalsis to slow down, resulting in the retention of food in the intestines, nausea, diarrhea, bloating, farting and other symptoms. 2. Pathologic factors: (1) Chronic gastritis: Helicobacter pylori, viruses, fungi and other long-term invasion of the gastric mucosa can cause inflammatory manifestations such as congestion and edema, resulting in nausea, vomiting, stomach pain, bloating, acid reflux, loss of appetite, and farting and other symptoms. (2) Ulcerative colitis: it is a group of inflammatory bowel disease associated with autoimmune, psychosomatic, environmental, bacterial and other infections, which can cause diarrhea, black stools, abdominal pain, nausea, abdominal distension, farting and other symptoms. Black fungus eaten will fart, there may be the consumption of spoiled black fungus caused by bacterial dysentery, acute gastroenteritis caused by, it is recommended to seek medical attention in a timely manner, under the guidance of the doctor for targeted treatment.