Gastric acid is due to increased secretion of gastric acid by the cells lining the stomach, which may be related to Helicobacter pylori infection, food stimulation, etc. The human body’s gastric acid secretion is continuous, its general state of the base secretion rate is about 10% of the maximum secretion rate, and is diurnal, peaks a few hours after going to sleep, and is lowest in the early morning before waking up. When food enters the stomach, it stimulates the gastric cells to begin secreting gastric acid. Gastric juice has a pH of about 7.0 to 7.2 when the stomach is fasting, and when food enters the stomach, the pH can drop to between 2 and 3. Therefore, in most cases stomach acid, mainly occurs after eating, when the secretion of stomach acid increases. When the presence of Helicobacter pylori infection, there will also be the manifestation of stomach acidity, but also accompanied by abdominal pain, abdominal distension, acid reflux and other symptoms, you need to take tetracycline bactericidal drug medication to relieve, such as omeprazole enteric-coated capsule, cimetidine and so on.