Common causes of loud farts in the morning include eating gas-producing foods, imbalance of intestinal flora and indigestion. 1. Eating gas-producing food: If you always like to eat gas-producing food like sweet potatoes, pumpkin and radish at dinner, these foods will produce a lot of gas in the gastrointestinal tract after a night of fermentation, and when you get up in the morning the next day, after the action of anal sphincter, you will let out loud farts. 2. Imbalance of intestinal flora: If the intestinal flora is imbalanced, i.e., the gas-producing bacteria increase in the intestines, these gas-producing bacteria can decompose the intestinal contents at night, releasing gases, and because of the early rise of the bacterial flora to stimulate intestinal peristalsis to accelerate the rapid expulsion of gases, which can lead to loud farts. 3. Indigestion: When indigestion, the food accumulated in the gastrointestinal tract at night which has not been fully digested and absorbed will be fermented, releasing a certain amount of gas, leading to an increase in the internal pressure of the intestinal tract, and the pressure at the anus will increase, so there will be loud farts when waking up in the morning. If you always have loud farts in the morning, you should go to the regular hospital in time to find out the cause of the disease, and choose the suitable method for your treatment under the guidance of professional doctors.