Stinky farts may be caused by enteritis, dietary abnormalities and irritable bowel syndrome. 1. Dietary abnormalities: If patients consume a large amount of food with high protein content within a short period of time, normal digestion will be easily affected. Protein fermentation will also produce odor and the symptom of fart smell will appear. 2. Intestinal inflammation: when unclean diet or suffering from inflammation, it may cause intestinal inflammation, so that the accumulation of food, abnormal fermentation produces a large amount of smelly gas, causing fart odor and farts. 3. Irritable Bowel Syndrome (IBS): When patients are affected by diet, immunity and other factors, it may lead to irritable bowel syndrome, and the symptoms of foul-smelling farts will appear after being stimulated. Smelly farts can also be caused by a variety of diseases, patients should go to the hospital for timely examination and treatment.