Low pepsin is prone to indigestion, causing increased gas, abdominal pain and bloating. Pepsin is a kind of digestive protease in the stomach, which is secreted by the main cells of the gastric mucosa in the stomach, and mainly acts on the proteins in the food to break them down into small peptides. If the pepsin decreases and the digestive function is poor, the symptoms of abdominal pain, bloating, and increased flatulence may occur. If pepsin decreases continuously, the pepsinogen ratio will decrease, and atrophic gastritis will occur in severe cases. In daily life, we need to pay attention to the dietary rules, avoid eating too hard, too acidic and other stimulating foods, avoid drinking strong tea, coffee, etc., if you have the habit of drinking alcohol to quit in time, pay attention to the protection of the gastric mucosa, if the symptoms are obvious, we should go to the appropriate department of the hospital in time, under the guidance of the doctor to improve the relevant examination and standardized treatment.