Farting with rotten egg odor may be caused by eating too much protein, or it may be caused by gastrointestinal indigestion and intestinal flora imbalance. 1. Eating too much protein food: Protein food, such as eggs, meat, etc., can be retained in the intestinal tract when consumed in excess, and under the action of intestinal flora, the protein decomposition produces amines, which emit a rotten egg odor. You can reduce the amount of protein you eat to reduce the smell of rotten farts. 2. Indigestion: when indigestion, the food is difficult to be digested, which is retained in the intestinal tract, after fermentation, decomposition, can also produce odor, when the protein content of these retained food is high, the fart will have rotten egg flavor. 3. Intestinal flora dysbiosis: If intestinal flora dysbiosis occurs, leading to a decrease in beneficial bacteria and an increase in harmful flora, there will also be a smelly exhaust. Farting is a normal physiological phenomenon, if the rotten egg flavor fart is not relieved, or accompanied by other symptoms, you should go to the hospital in a timely manner, clear reasons for targeted treatment.