The possible clinical causes for the vague pain in the left upper abdomen and constant farting include chronic gastritis, gastric ulcer and indigestion. 1. Chronic gastritis: this condition is usually associated with Helicobacter pylori infection, the people suffering from this disease, the gastric mucosa is damaged and related digestive symptoms, clinical manifestations of increased exhaust, abdominal pain, diarrhea, nausea, loss of appetite and so on. 2. Gastric ulcer: the gastric mucosa of people suffering from this disease is damaged by pepsin and gastric acid, and related symptoms appear, such as flatulence, abdominal pain, increased gas. It is recommended to use gastrointestinal mucous membrane protection agents such as teprenone and acid inhibitors such as omeprazole under the guidance of a doctor. 3. Dyspepsia: The large amount of food stored in the gastrointestinal tract produces undesirable fermentation, especially protein foods, the fermentation process will produce more gas, manifested as increased exhaust, abdominal distension, accompanied by hidden pain in the left upper abdomen. In normal life, supplement enough water needed by the human body, can eat more fresh vegetables and fruits, and keep the bowel movement smooth. Left upper abdominal pain and farting may also be related to stomach cramps, if the symptoms persist or have a tendency to aggravate, it is recommended to go to the hospital for a clear diagnosis, so as to carry out targeted treatment.