Tummy pain and fart odor are mainly considered to be related to improper diet, functional diseases, organic lesions of the gastrointestinal tract and other factors. 1. Improper diet: overeating, frequent consumption of cold stimulating, spicy and greasy food will cause some stimulation to the stomach and intestines, which can lead to an increase in gastrointestinal gas, and cause abdominal pain, fart odor and other symptoms. 2. Functional diseases: such as functional dyspepsia, which can cause abdominal pain, fart odor, loss of appetite, nausea, belching (hiccups) and other symptoms; irritable bowel syndrome, which can lead to abdominal pain, diarrhea, constipation and other symptoms, but also fart odor performance may occur. 3. Organic lesions of the gastrointestinal tract: such as acute and chronic gastritis, and gastric ulcer, duodenal ulcer and other diseases, can lead to indigestion, abdominal pain, frequent farting, farting odor symptoms. When the symptoms of stomach pain and fart odor appear, it is recommended that the patient consult a doctor in time to find out the cause and follow the doctor’s instructions for treatment.