Bad breath and farting is not a precursor of liver disease, it may be due to dietary factors, indigestion, gastritis, constipation, and is not considered a precursor of liver disease. Liver disease is usually characterized by pain in the upper right liver area, abdominal distension, weight loss and other symptoms, simple bad breath and farting are not typical symptoms of liver disease. 1. Dietary factors: eating a lot of food with special odor, such as leeks, garlic, etc., may lead to bad breath, because these foods produce a lot of gas when digested and decomposed in the stomach and cause farting, which usually does not require special treatment. 2. indigestion: because of the slow peristalsis of the stomach, the secretion of digestive juices in the stomach is relatively small, the food in the stomach can not be emptied as soon as possible, stagnant for a long time, and the digestive juices through the fermentation of the gas produced by the odor reflux to the mouth and cause bad breath, but also lead to an increase in farting, bloating, loss of appetite and other symptoms. 3. Gastritis: Inflammation of the gastric mucous membrane damage, affecting the digestion of food, food in the stomach through abnormal fermentation, gas production increases leading to bloating, bad breath, farting. 4. constipation: people who are often constipated, due to poor digestion and absorption ability, will also affect the emptying of food, resulting in bad breath and farting. It is recommended to consult a doctor in time to identify the cause and give targeted treatment.