Gastric acid is a normal component of gastric juice, mainly hydrochloric acid, which is secreted by the cells lining the stomach. It plays an important role in the digestion and absorption of gastric contents, and also has a bactericidal effect. The secretion of gastric acid is closely related to various factors, such as the amount and type of food eaten, organic lesions and emotions. Emotions are closely related to the function of the digestive system. When human beings are in a bad mood, over-stressed or over-fatigued, cortical functions are affected and gradually become disturbed, resulting in irregular secretion of gastric juices and excessive secretion of gastric acid. Such cases can be quickly adjusted to normal by maintaining a happy mood. Some patients have a family history of excessive gastric acid secretion, and studies have shown that the amount of gastric acid secretion is genetically related. Improper diet can also cause excessive secretion of gastric acid, such as eating a large amount of too hot or too cold, too sweet or too salty, too spicy or too acidic food, etc., which stimulates the gastric mucosa, causing the wall cells to secrete large amounts of gastric acid; some coarse grains, such as sweet potatoes and potatoes, can also promote the secretion of large amounts of gastric acid, affecting the digestion and absorption of food. Some organic pathologies can also lead to an increase in gastric acid, such as chronic gastritis and peptic ulcer, which stimulate the mucous membrane of the stomach and cause excessive secretion of gastric acid, and then destroy the mucous membrane of the stomach and duodenum, resulting in acid reflux and heartburn and pain in the abdomen. In summary, excessive secretion of gastric acid is a clinical symptom caused by a variety of factors, and if it cannot be removed after proper treatment, it is necessary to visit a hospital and treat the cause to solve the problem at root.