Burping with a fermented odor is usually caused by indigestion, improper diet, poor habits and psychological factors, as follows: 1, improper diet: eating too much gas-producing food, such as turnips, sweet potatoes, soy products, or overeating, so that the stomach load exceeds the norm, the stomach muscle peristaltic force is insufficient, the stomach can not be emptied on time, the accumulation of food in the stomach for too long, resulting in burping with a fermented 2, bad habits: such as long-term bed rest, lack of exercise leading to gastric emptying disorders, excessive smoking will make the pyloric sphincter muscle relaxation caused by bile reflux, as well as drinking alcohol to make the gastric mucosa damage and other such phenomena; 3, indigestion: common in various diseases caused by indigestion, including gastroesophageal reflux, esophageal hiatus hernia, peptic ulcer, chronic gastritis, gastric cancer, gastric outlet obstruction, chronic pharyngitis, hepatobiliary and pancreatic diseases, etc., resulting in poor digestive function and insufficient gastric power, which in turn leads to hiccups with fermented odor; 4. Psychosomatic factors: mental tension and emotional sadness can affect the sympathetic nerve, which inhibits the peristaltic and emptying functions of the stomach, resulting in hiccups with odor. When hiccups with fermented odor occur, you should first pay attention to good habits, adjust your diet, eat more vitamin-rich, easy-to-digest foods such as thin rice, noodles, fresh vegetables and fruits, avoid gas-producing foods, avoid overeating, quit smoking and drinking, and increase physical activity in moderation. If the symptoms are not relieved, you should go to the hospital in time to improve the relevant examination to exclude any other organic diseases, and you can also take drugs to promote gastric motility, such as mosapride and domperidone tablets, under the guidance of the doctor.